---

Index to the U.S. Patent Classification

Coverage: 1977-2003
ISSN: 0161-9470

Volumes:

Click here for current content ()
2003 (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)