1960's Plant Patent Counts

yearfirstcount
1960PP1,893116
1961PP2,009108
1962PP2,11791
1963PP2,208129
1964PP2,337128
1965PP2,465120
1966PP2,585114
1967PP2,69985
1968PP2,78472
1969PP2,856103
 Total:1,066

1950's   Back   1970's