Index to the U.S. Patent Classification
Coverage: 1977-2003
ISSN: 0161-9470
Volumes:
Click here for current content2003 (2003)
2002 (2002)
2001 (2001)
2000 (2000)
1999 (1999)
1998 (1998)
1997 (1997)
1996 (1996)
1995 (1995)
1994 (1994)
1993 (1993)
1992 (1992)
1991 (1991)
1990 (1990)
1989 (1989)
1988 (1988)
1987 (1987)
1986 (1986)
1985 (1985)
1984 (1984)
1983 (1983)
1980 (1980)
1977 (1977)