Owner
Patent Number
Patent Year	1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 To 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
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Sources
CLAIMS®/Current Patents Legal Status from IFI CLAIMS Patent Services. Information on the current status of U.S. patents, including legal status and reassignment data provided by the U.S. Patent & Trademark Office. Reassigned patents from 1980; reexamined patents from 1981; expired patents from September 1985; extended patents from April 1986; reinstated patents from October 1986.