Drilldown: Patents

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Patents > Inventors : Bruce Hofer or Gene Andrews or Les Larson or Phil Crosby & Filing date: 1980 - 1989 & Cites : ... or Patent US 3215948A or Patent US 3293474A or Patent US 3413513A or Patent US 3531675A or Patent US 3689752A or Patent US 3753170A or None

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