1980's Plant Patent Counts

yearfirstcount
1980PP4,491117
1981PP4,612183
1982PP4,796173
1983PP4,970197
1984PP5,168212
1985PP5,380242
1986PP5,622224
1987PP5,846229
1988PP6,075425
1989PP6,501587
 Total:2,589

1970's   Back   1990's