Drilldown: Patents

Patents > Inventors : Dan Knierim or Phil Crosby or Richard A. Jackson & Filing date: 1980 - 1989 & Grant date: 1989 & Cites : Patent GB 460562A or Patent US 2883619A or Patent US 3293474A or Patent US 3331983A or Patent US 3358159A or Patent US 3629731A or Patent US 4146844A or Patent US 4322688A or None & Links: None

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