| May | Richard | tuning device ratchet | 2449079 | Cedar Rapids | 1948 |
| Sansbury | George | step-by-step automatic tuning control | 2449178 | Cedar Rapids | 1948 |
| Austin | Ellsworth | selective hydraulic control structure | 2449269 | Cedar Rapids | 1948 |
| Boileau | Arthur | churn support | 2449446 | Cedar Rapids | 1948 |
| Owen | Carlton | starch resin reaction product and method of producing the same | 2450377 | Cedar Rapids | 1948 |
| Black | William | starch resin reaction product and method of producing the same | 2450377 | Cedar Rapids | 1948 |
| Hicks | William | starch resin reaction product and method of producing the same | 2450377 | Cedar Rapids | 1948 |
| Kesler | Carl | starch resin reaction product and method of producing the same | 2450377 | Cedar Rapids | 1948 |
| Rockwell | Harvey | piston pump | 2453266 | Cedar Rapids | 1948 |
| Moseley | Francis | voltage regulator system | 2453451 | Cedar Rapids | 1948 |
| Croskey | Earl | door check | 2453831 | Cedar Rapids | 1948 |
| Hackman | Victor | door check | 2453831 | Cedar Rapids | 1948 |
| Smith | Franklin | support means for idler rollers | 2455100 | Cedar Rapids | 1948 |
| Doelz | Melvin | radio system for transmission and reception on the same frequency | 2457134 | Cedar Rapids | 1948 |
| Wirkler | Walter | radio direction finding | 2477434 | Cedar Rapids | 1949 |
| Packwood | Charles | controlling the flow of liquids | 2477494 | Cedar Rapids | 1949 |
| Baker | Walter | front end tractor implement | 2478747 | Cedar Rapids | 1949 |
| Deal | Troy | front end tractor implement | 2478747 | Cedar Rapids | 1949 |
| Duttweiler | Henry | front end tractor implement | 2478747 | Cedar Rapids | 1949 |
| Burrell | George | moisture shield for spark plugs | 2480545 | Cedar Rapids | 1949 |
| Sigmundi | Arthur | bait retainer for fishhooks | 2482721 | Cedar Rapids | 1949 |
| Whetstine | Jesse | hand operated saw filing device | 2484438 | Cedar Rapids | 1949 |
| May | Richard | selective control device for radio apparatus and the like | 2484638 | Cedar Rapids | 1949 |
| Moseley | Francis | frequency and speed stabilizing system | 2484639 | Cedar Rapids | 1949 |
| Wetzel | Grant | automatic acoustic control for public address systems and the like | 2484662 | Cedar Rapids | 1949 |
| Rockwell | Harvey | detachable implement for vehicles | 2486372 | Cedar Rapids | 1949 |
| Davis | Frank | channelized high-frequency signal receiving systems | 2487857 | Cedar Rapids | 1949 |
| Maki | George | high power permeability core inductance | 2458282 | Cedar Rapids | 1949 |
| Hyler | Loiell | universal hitch | 2458781 | Cedar Rapids | 1949 |
| Salisbury | Winfield | method and apparatus for producing neutrons | 2489436 | Cedar Rapids | 1949 |
| Wulfsberg | Paul | modulation control system | 2459208 | Cedar Rapids | 1949 |
| Baumgardner | Earl | coupling device | 2461024 | Marion | 1949 |
| Bruene | Warren | dual microphone system | 2490943 | Cedar Rapids | 1949 |
| Bechtel | Welker | viscometer | 2491639 | Cedar Rapids | 1949 |
| Estes | Joseph | latching means for tractor hitch bars | 2461885 | Cedar Rapids | 1949 |
| Kesler | Carl | viscometer | 2491639 | Cedar Rapids | 1949 |
| Salisbury | Winfield | cyclotron oscillator system | 2492324 | Cedar Rapids | 1949 |
| Moseley | Francis | remotely tuned radio apparatus and the like | 2492392 | Cedar Rapids | 1949 |
| Hubbard | Merle | high frequency resonator | 2462639 | Cedar Rapids | 1949 |
| Maki | George | frequency shift carrier system | 2463402 | Cedar Rapids | 1949 |
| Schuler | Leo | plexiglas shaping machine | 2466045 | Cedar Rapids | 1949 |
| Kesler | Carl | preparing an adhesive from cereal flour | 2466172 | Cedar Rapids | 1949 |
| Hicks | William | preparing an adhesive from cereal flour | 2466172 | Cedar Rapids | 1949 |
| May | Richard | automatic shaft controling apparatus | 2466776 | Cedar Rapids | 1949 |
| Pollitz | Harold | earth compactor | 2466822 | Cedar Rapids | 1949 |
| Pitts | Robert | portable drill | 2466965 | Cedar Rapids | 1949 |
| Capper | Lyle | weighted pivoted sign | 2467187 | Lisbon | 1949 |
| Bruene | Warren | automatic radio control apparatus | 2467422 | Cedar Rapids | 1949 |
| Langhurst | Louis | solvent recovery distillation system | 2467435 | Cedar Rapids | 1949 |
| Couillard | Luther | automatic volume control arrangement | 2530000 | Cedar Rapids | 1950 |
| Less | Albert | collar attachment | 2505679 | Cedar Rapids | 1950 |
| Moseley | Francis | self synchronous positional control system | 23290 | Cedar Rapids | 1950 |
| Stookey | Nelson | tank heater | 2520576 | Central City | 1950 |
| Streeter | Royal | changing the ion source of a cycoltron | 2531065 | Cedar Rapids | 1950 |
| Peters | John | changing the ion source of a cycoltron | 2531065 | Cedar Rapids | 1950 |
| Livingood | John | changing the ion source of a cycoltron | 2531065 | Cedar Rapids | 1950 |
| Rosche | John | thermostatic switch | 2532859 | Cedar Rapids | 1950 |
| Pyle | Ross | selective shaft positioning control | 2533398 | Cedar Rapids | 1950 |
| Shanklin | John | antenna | 2533900 | Cedar Rapids | 1950 |
| Griswold | Laurence | foldable frame for trampolines, beds, or the like | 2534019 | Cedar Rapids | 1950 |
| Klippel | Kenneth | modulation protective arrangement | 2534073 | Cedar Rapids | 1950 |
| Sherwood | John | modulation protective arrangement | 2534073 | Cedar Rapids | 1950 |
| Smith | William | battery electrolyte level indicator | 2534633 | Cedar Rapids | 1950 |
| Hyler | Loiell | hitch construction | 2535927 | Cedar Rapids | 1950 |
| Bunting | Norman | combination grain feeding and threshing means for harvesters | 2493105 | Cedar Rapids | 1950 |
| Gaddis | Roy | conbeyer structure | 2493451 | Cedar Rapids | 1950 |
| Pollitz | Harold | portable mixing plant | 2493898 | Cedar Rapids | 1950 |
| Farrell | Fred | circuit breaker | 2506546 | Cedar Rapids | 1950 |
| Rockwell | Harvey | hydraulically operated clutch and brake unit for winding reels | 2506842 | Cedar Rapids | 1950 |
| Otto | Charles | feed trough for animals | 2507264 | Cedar Rapids | 1950 |
| Slauson | Stephen | meat tenderizer | 2554646 | Cedar Rapids | 1951 |
| Lebeda | Paul | internal combustion engine and crank shaft therefor | 2554993 | Cedar Rapids | 1951 |
| Leonard | John | folding dinette table and benches | 2559021 | Cedar Rapids | 1951 |
| Davis | Frank | radio transmitting and receiving combination | 2560558 | Cedar Rapids | 1951 |
| Unzeitig | Milvey | vehicle spring suspension | 2560999 | Cedar Rapids | 1951 |
| Livingood | John | electron discharge device of the cavity resonator type with feedback | 2562319 | Cedar Rapids | 1951 |
| Salisbury | Winfield | electron discharge device of the cavity resonator type with feedback | 2562319 | Cedar Rapids | 1951 |
| May | Richard | shaft positioning apparatus | 2536070 | Cedar Rapids | 1951 |
| Pollitz | Harold | hammermill with decentric rotors | 2563958 | Cedar Rapids | 1951 |
| Stark | John | dough holding attachment for fishhooks | 2564216 | Cedar Rapids | 1951 |
| Shotten | James | 2,5-disubstituted-tetrahydo-1,25-thiadiazines and methods of preparing same | 2537633 | Cedar Rapids | 1951 |
| Davis | Frank | radio communication transmitting and receiving combination | 2537972 | Cedar Rapids | 1951 |
| Hyler | Loiell | earth mover | 2565499 | Cedar Rapids | 1951 |
| Galbraith | Melvin | apron and ejector control for earth moving apparatus | 2565850 | Cedar Rapids | 1951 |
| Hyler | Loiell | apron and ejector control for earth moving apparatus | 2565850 | Cedar Rapids | 1951 |
| Hyler | Loiell | apron and ejector control linkage for earth movers of the carry type | 2565851 | Cedar Rapids | 1951 |
| Newbold | Park | automatic drain spout | 2541536 | Cedar Rapids | 1951 |
| Rosenberger | Emil | umbrella carrier | 2541614 | Cedar Rapids | 1951 |
| Loufek | Frank | centrifugal mill hammer with renewable wearing tip | 2568077 | Cedar Rapids | 1951 |
| Grimm | Ralph | adjustable alignment platform for x-ray tables | 2568191 | Cedar Rapids | 1951 |
| Redmond | William | inner guide for visible index systems | 2568302 | Cedar Rapids | 1951 |
| Newbold | Park | pedal lift gate | 2542258 | Cedar Rapids | 1951 |
| Clark | John | electric field mapping device | 2542478 | Cedar Rapids | 1951 |
| Couillard | Luther | noise control arrangement for radio receivers and the like | 2542523 | Cedar Rapids | 1951 |
| Couillard | Luther | noise control arrangement for radio receivers and the like | 2543523 | Cedar Rapids | 1951 |
| Stark | John | merchandise order indicator | 2543609 | Cedar Rapids | 1951 |
| Kinsley | Jason | artificial denture | 2570562 | Cedar Rapids | 1951 |
| Rockwell | Harvey | hydraulic system for operating hydraulic cylinders and pistons | 2543989 | Cedar Rapids | 1951 |
| Powell | Virgil | license and key container | 2571609 | Cedar Rapids | 1951 |
| Salisbury | Winfield | thermoelectric power generator | 2597752 | Cedar Rapids | 1952 |
| Smith | John | timing circuit | 2622195 | Cedar Rapids | 1952 |
| Gerks | Irvin | axis converter | 2599381 | Cedar Rapids | 1952 |
| Cooper | La Mar | refrigerator cabinet latch strike | 2622911 | Cedar Rapids | 1952 |
| Kohl | Walter | assembly device for resnatron filaments | 2599394 | Cedar Rapids | 1952 |
| Kohl | Walter | filament temperature compensating device | 2599395 | Cedar Rapids | 1952 |
| Tubbs | Irl | resilient valve in rigid wall portions of containers | 2585286 | Mount Vernon | 1952 |
| Menkemeller | Raymond | fluid meter | 2599514 | Cedar Rapids | 1952 |
| Moseley | Francis | computer device for navigation systems and the like | 2599889 | Cedar Rapids | 1952 |
| Heald | Earl | computer device for navigation systems and the like | 2599889 | Cedar Rapids | 1952 |
| Anderson | Oliver | punching apparatus | 2585720 | Cedar Rapids | 1952 |
| Biggs | John | computer device for navigation systems and the like | 2599889 | Cedar Rapids | 1952 |
| Clark | John | dielectrically wedged biconical antenna | 2599896 | Cedar Rapids | 1952 |
| Chebak | Fred | folding chair | 165907 | Cedar Rapids | 1952 |
| May | Richard | shaft positioning device | 2585955 | Cedar Rapids | 1952 |
| Newbold | Park | sacking and weighing machine | 2586557 | Cedar Rapids | 1952 |
| Wirkler | Walter | frequency modulation generator | 2602159 | Cedar Rapids | 1952 |
| Maly | Bohuslav | automatic feeding machine | 2602275 | Marion | 1952 |
| Kintzinger | Warren | mechanical movement | 2602662 | Cedar Rapids | 1952 |
| Hardy | Bryan | gate construction | 2603895 | Cedar Rapids | 1952 |
| Pyle | Ross | automatic shaft positioning apparatus | 2604965 | Cedar Rapids | 1952 |
| Schweighofer | Horst | automatic shaft positioning apparatus | 2604965 | Cedar Rapids | 1952 |
| Salisbury | Winfield | power divider circuit | 2605357 | Cedar Rapids | 1952 |
| McCoy | David | linear sweep generator | 2606287 | Cedar Rapids | 1952 |
| Couillard | Luther | radio panel | 168214 | Cedar Rapids | 1952 |
| Otto | Charles | feeder structure | 2608179 | Cedar Rapids | 1952 |
| Harris | Donald | multichannel transmission system | 2611825 | Cedar Rapids | 1952 |
| McCoy | David | high speed slewing | 2611893 | Cedar Rapids | 1952 |
| McCoy | David | folded delay line | 2589076 | Cedar Rapids | 1952 |
| Newbold | Park | cigarette recaser with elevator unit and pusher mechanism | 2644627 | Cedar Rapids | 1953 |
| Pyle | Ross | automatic tuning control for radion apparatus and the like | 2645321 | Cedar Rapids | 1953 |
| May | Richard | automatic tuning control for radio apparatus and the like | 2645321 | Cedar Rapids | 1953 |
| Bucksbaum | Arnold | automatic tuning circuit | 2645719 | Cedar Rapids | 1953 |
| Fisk | Roy | door holder | 2647782 | Cedar Rapids | 1953 |
| Kohl | Walter | internal lathe burner | 2648166 | Cedar Rapids | 1953 |
| Fisher | Floyd | internal lathe burner | 2648166 | Cedar Rapids | 1953 |
| Collmann | Alvill | tractor-mounted windrower | 2648186 | Coggon | 1953 |
| Beranek | Anthony | tractor-mounted windrower | 2648186 | Coggon | 1953 |
| Rockwell | Harvey | bulldozer with push frame stabilizer mechanism | 2624131 | Cedar Rapids | 1953 |
| Bollhoefer | Dale | momentary switch | 2648728 | Cedar Rapids | 1953 |
| Kohl | Walter | radiation detector | 2648779 | Cedar Rapids | 1953 |
| Eberhardt | Arthur | variable intermediate frequency transformer | 2648825 | Cedar Rapids | 1953 |
| Corbell | Paul | double parallel plane magnetron | 2648860 | Cedar Rapids | 1953 |
| Kesler | Carl | alkaline-setting resin adhesive and method of making same | 2626934 | Cedar Rapids | 1953 |
| Miller | Glen | adjusting mechanism for the digging boom and scraper boom of endless type ditching machines | 2649792 | Marion | 1953 |
| Beason | Robert | auxiliary spring structure | 2627404 | Cedar Rapids | 1953 |
| Hjermstad | Erling | alkaline-setting resin starch reaction product and preparation thereof | 2650205 | Cedar Rapids | 1953 |
| Kesler | Carl | alkaline-setting resin starch reaction product and preparation thereof | 2650205 | Cedar Rapids | 1953 |
| Hafner | Oliver | freezer divider | 2627993 | Cedar Rapids | 1953 |
| Newbold | Park | check-out device | 2650678 | Cedar Rapids | 1953 |
| Soderstrom | Harry | metal-to-ceramic seal | 2650683 | Cedar Rapids | 1953 |
| McPhee | Kenneth | metal-to-ceramic seal | 2650683 | Cedar Rapids | 1953 |
| Boileau | Arthur | centrifugal tester | 2628773 | Cedar Rapids | 1953 |
| Hime | Norman | potentiometer | 2650974 | Cedar Rapids | 1953 |
| Hubbard | Merle | high frequency inductor | 2629081 | Cedar Rapids | 1953 |
| Pitts | Robert | poultry scalding apparatus | 2651807 | Cedar Rapids | 1953 |
| Shanklin | John | dipole antenna and feed arrangement therefor | 2652492 | Cedar Rapids | 1953 |
| Griswold | Laurence | trampolin | 2652966 | Cedar Rapids | 1953 |
| Pearson | Norman | hydraulic truck body tilting mechanism | 2630929 | Whittier | 1953 |
| Lauther | Leslie | chassis fastening means | 2630996 | Cedar Rapids | 1953 |
| Kintzinger | Warren | consumable cartridge | 2632391 | Cedar Rapids | 1953 |
| Newbold | Park | carton cutter | 2632945 | Cedar Rapids | 1953 |
| Lattner | Emert | mobile spraying equipment | 2655405 | Cedar Rapids | 1953 |
| Black | Robert | filament tensioning device | 2656480 | Cedar Rapids | 1953 |
| Corbell | Paul | filament tensioning device | 2656480 | Cedar Rapids | 1953 |
| Nicholson | Gordon | shaft positioning system | 2656497 | Cedar Rapids | 1953 |
| Schweighofer | Horst | shaft positioning system | 2656497 | Cedar Rapids | 1953 |
| Salisbury | Winfield | super high frequency electromagnetic wave generator | 2634372 | Cedar Rapids | 1953 |
| Tubbs | Irl | vehicle tire | 2634785 | Mount Vernon | 1953 |
| Salisbury | Winfield | variable frequency cyclotron | 2659000 | Cedar Rapids | 1953 |
| Harris | Donald | phase modulation system and apparatus | 2635226 | Cedar Rapids | 1953 |
| Pappenfus | Ernest | recognizer circuit | 2659879 | Cedar Rapids | 1953 |
| Pickard | Willard | space measuring means | 2662292 | Cedar Rapids | 1953 |
| Cooper | La Mar | refrigeration construction | 2660037 | Cedar Rapids | 1953 |
| McGowan | Harold | speed reducer | 2662422 | Cedar Rapids | 1953 |
| Corey | Flournoy | auxiliary spring for automobile leaf springs | 2661205 | Cedar Rapids | 1953 |
| Hanser | William | tear-cord applying maachine and method | 2661582 | Cedar Rapids | 1953 |
| Stanley | Lamont | information storing device | 2662944 | Cedar Rapids | 1953 |
| Fritze | Edgar | information storing device | 2662944 | Cedar Rapids | 1953 |
| Carney | Charles | information storing device | 2662944 | Cedar Rapids | 1953 |
| Sidlinger | Paul | safety belt construction | 2661888 | Cedar Rapids | 1953 |
| Kohl | Walter | resnatron filament basket | 2662990 | Cedar Rapids | 1953 |
| Witters | Robert | electric motor control for shaft positioning systems | 2662998 | Cedar Rapids | 1953 |
| Kohl | Walter | method of forming vacuum tight metal to vitreous seals | 2674788 | Cedar Rapids | 1954 |
| Clark | John | electronic magnetic analytical balance | 2675222 | Cedar Rapids | 1954 |
| Schweighofer | Horst | shaft positioning mechanism for binary code operation | 2676289 | Cedar Rapids | 1954 |
| Wulfsberg | Arthur | shaft positioning mechanism for binary code operation | 2676289 | Cedar Rapids | 1954 |
| Armstrong | William | high frequency power transmission line for cyclotrons and the like | 2676309 | Cedar Rapids | 1954 |
| Everhart | Thomas | through clamp for coaxial cables | 2678963 | Cedar Rapids | 1954 |
| Pappenfus | Ernest | synchronizing mechanism | 2678966 | Cedar Rapids | 1954 |
| Craiglow | Robert | synchronizing mechanism | 2678966 | Cedar Rapids | 1954 |
| Doelz | Melvin | frequency selector | 2679006 | Cedar Rapids | 1954 |
| Schulte | Frederick | movie camera shutter release actuating means | 2679186 | Cedar Rapids | 1954 |
| Spaight | Harold | masonry joint structure | 2680370 | Cedar Rapids | 1954 |
| Shuttleworth | Vivian | cigarette case having a time controlled locking means | 2681560 | Cedar Rapids | 1954 |
| Schwittek | Elmer | linear frequency shift keying circuit | 2682035 | Cedar Rapids | 1954 |
| Bowser | Virgil | self propelled sod cutting machine | 2682824 | Cedar Rapids | 1954 |
| Dare | Edwin | self propelled sod cutting machine | 2682824 | Cedar Rapids | 1954 |
| Platt | Arthur | self opening and closing gate apparatus | 2683945 | Cedar Rapids | 1954 |
| Noe | William | break gauge setting device | 2684538 | Marion | 1954 |
| Lattner | Emert | mobile spraying equipment | 2684865 | Cedar Rapids | 1954 |
| Cox | Robert | automatic frequency control system | 2685032 | Cedar Rapids | 1954 |
| Black | Robert | filament tensioning device | 2685045 | Marion | 1954 |
| McCreary | Ralph | expansible conductive seal for resonant cavities | 2685071 | Cedar Rapids | 1954 |
| Price | George | thermocouple vacuum gauge | 2685665 | Cedar Rapids | 1954 |
| Salisbury | Winfield | electron beam device | 2688107 | Cedar Rapids | 1954 |
| Vanous | Joseph | detachable handle | 2689760 | Cedar Rapids | 1954 |
| Witters | Robert | compensating variable capacitor | 2689931 | Cedar Rapids | 1954 |
| Passman | Harry | antibacklash control shaft | 2690682 | Cedar Rapids | 1954 |
| Maly | Lucille | supporting pad | 2690748 | Cedar Rapids | 1954 |
| Umina | Francis | coaxial cable connector | 2691059 | Cedar Rapids | 1954 |
| Weber | David | shaft control mechanism | 2691081 | Cedar Rapids | 1954 |
| Pitts | Robert | poultry stunning device | 175231 | Cedar Rapids | 1955 |
| Ringoen | Richard | special relay control of servomotors | 2701327 | Cedar Rapids | 1955 |
| Maloy | Ernest | hair clippers | 2726447 | Cedar Rapids | 1955 |
| Beardsley | Clarence | stadium chair | 2702076 | Cedar Rapids | 1955 |
| Beardsley | Joan | stadium chair | 2702076 | Cedar Rapids | 1955 |
| Craiglow | Robert | means for preventing aging effects in piezoelectric cystals | 2727296 | Cedar Rapids | 1955 |
| Haerther | Lester | torque limiter | 2727372 | Cedar Rapids | 1955 |
| Linse | Marcus | pug mill paddle adjustable mounting means | 2727732 | Cedar Rapids | 1955 |
| Plumb | Robert | pug mill paddle adjustable mounting means | 2727732 | Cedar Rapids | 1955 |
| Finger | Paul | interdigital magnetron | 2728029 | Cedar Rapids | 1955 |
| Mifflin | Leo | motion converting mechanism | 2728235 | Cedar Rapids | 1955 |
| Lasho | Clarence | isolated tube socket | 2702891 | Marion | 1955 |
| Kempter | Joseph | vertically adjustable bookkeeping stand | 2728621 | Cedar Rapids | 1955 |
| Macek | Matt | stone disc grinding mills, with unitary material impeller secured to runner stone | 2704189 | Cedar Rapids | 1955 |
| Morrison | Stuart | homing switch | 2704310 | Cedar Rapids | 1955 |
| Johnson | Frederick | homing switch | 2704310 | Cedar Rapids | 1955 |
| Broadhead | Samuel | squelch circuit | 2704324 | Cedar Rapids | 1955 |
| Platt | Arthur | self opening and closing gate apparatus | 2705338 | Cedar Rapids | 1955 |
| Fritze | Edgar | angle shifter | 2706080 | Cedar Rapids | 1955 |
| Carney | Charles | angle shifter | 2706080 | Cedar Rapids | 1955 |
| Demory | Harry | block scraper | 2706304 | Cedar Rapids | 1955 |
| Clemens | John | umbrella | 2707476 | Cedar Rapids | 1955 |
| Lake | Anthony | spectator's seat with back rest | 2707513 | Marion | 1955 |
| Luebking | Walter | motor driven shaft positioning system | 2710935 | Cedar Rapids | 1955 |
| Pierce | Roger | ultra short range altimeter system | 2710959 | Cedar Rapids | 1955 |
| Fritze | Edgar | punch card controlled aircraft navigation computer | 2710962 | Cedar Rapids | 1955 |
| Tubbs | Irl | slitting and assembling a rubber valve in a can top | 2713713 | Mount Vernon | 1955 |
| Beldt | Lauren | rotation limit device | 2716896 | Cedar Rapids | 1955 |
| Lewis | Dean | rotation limit device | 2716896 | Cedar Rapids | 1955 |
| Wulfsberg | Arthur | differential mechanism | 2716897 | Cedar Rapids | 1955 |
| Hileman | Dale | biirectional remote electrical control device | 2717345 | Cedar Rapids | 1955 |
| Price | George | double mixer | 2717360 | Cedar Rapids | 1955 |
| Hubbard | Merle | resonator tuner | 2717363 | Cedar Rapids | 1955 |
| Mifflin | Leo | temperature compensation of permeability tuned circuits | 2717364 | Cedar Rapids | 1955 |
| Hodgin | David | temperature compensation of permeability tuned circuits | 2717364 | Cedar Rapids | 1955 |
