Drilldown: Patents
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Patents > Inventors :
Bruce J. Penney or
Dan Knierim
& Grant date:
1989
& Cites :
Patent US 3011129A or
Patent US 3293473A or
Patent US 3358159A or
Patent US 3510690A or
Patent US 3689752A or
Patent US 4048577A or
Patent US 4255003A
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