Drilldown: Patents

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Patents > Inventors : Bruce Hofer or George Frye or John Kobbe or Linley Gumm or Phil Crosby & Filing date: 1970 - 1979 & Cites : Patent GB 460562A or Patent US 2280531A or Patent US 3293474A or Patent US 3358159A or Patent US 4146844A or Patent US 4150420A or None

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