Drilldown: Patents
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Patents > Inventors :
Bruce Hofer or
Bruce J. Penney or
Dan Knierim or
John Kobbe or
Les Larson or
Phil Crosby
& Filing date:
1997
& Grant date:
1990 - 1999
& Cites :
Patent US 3312850A or
Patent US 3510690A or
Patent US 4048577A or
Patent US 4150420A or
Patent US 4255003A
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