Drilldown: Patents

Patents > Inventors : Art Metz or Bruce J. Penney or Dan Knierim or John Addis or John Kobbe & Filing date: 1982 & Grant date: 1980 - 1989 & Cites : Patent GB 460562A or Patent US 2280531A or Patent US 3214631A or Patent US 3430093A or Patent US 3740539A or Patent US 4150420A or None

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