Volume 1: Patents
Posted: Wed Dec 03, 2014 11:00 pm
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Farmer's Notes, Volume 1: Patents
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(Complete December 2014. Then fallow waiting for rest)
Farmer's Notes, Volume 1: Patents
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(Complete December 2014. Then fallow waiting for rest)
- 1790-1921: Pretty much complete coverage.
1921-1945: Good coverage.
1945-1960: Scanty coverage.
1960-1980: Very limited coverage.
1980-now: No coverage.