Drilldown: Patents

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Patents > Inventors : Linley Gumm or Phil Crosby & Filing date: 1980 - 1989 & Grant date: 1984 & Cites : Patent GB 460562A or Patent US 2280531A or Patent US 3531675A or Patent US 3629731A or Patent US 3753170A or Patent US 4150420A or None

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