Linn County Inventors & Their Patents
1855 - 1877
1878 - 1889
1890 - 1905
1906 - 1917
1918 - 1927
1928 - 1937
1938 - 1947
1948 - 1955
1956 - 1959
Source info:
Inventors & Their Patents
(1843 - 2009)
Off-site link to
Davenport Public Library
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