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Agricultural Biotechnology Intellectual Property: Standard Tables
Year links take you to the relevant patent list within the Detail table.

Utility patents by year, U.S. companies only
Year Utility patents
 Number
1976 23
1977 28
1978 36
1979 38
1980 42
1981 46
1982 49
1983 38
1984 44
1985 62
1986 58
1987 96
1988 99
1989 135
1990 93
1991 162
1992 171
1993 170
1994 206
1995 184
1996 338
1997 378
1998 581
1999 618
2000 636
All years 4,331
Date created: 5/27/2004 1:06:48 PM

 
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Updated date: August 26, 2004