Drilldown: Patents

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Patents > Inventors : Bruce Hofer or Dan Knierim or Richard A. Jackson & Filing date: 1970 - 1979 & Grant date: 1974 & Cites : Patent GB 460562A or Patent US 3293474A or Patent US 3325673A or Patent US 3331983A or Patent US 3725792A or Patent US 4146844A or Patent US 4150420A or None

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