Drilldown: Patents
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Patents > Inventors :
Bruce J. Penney or
Linley Gumm or
Phil Crosby
& Filing date:
1980 - 1989
& Cites :
Patent GB 460562A or
Patent US 2280531A or
Patent US 3011129A or
Patent US 3753170A or
Patent US 4150420A
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