Drilldown: Patents

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Patents > Inventors : Bruce J. Penney or Linley Gumm or Phil Crosby & Filing date: 1990 - 1999 & Cites : Patent GB 460562A or Patent US 2922074A or Patent US 3510690A or Patent US 3531675A or Patent US 3629731A or Patent US 4146844A or None

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