Drilldown: Patents
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Patents > Inventors :
Bruce Hofer or
Les Larson or
Linley Gumm or
Phil Crosby
& Company :
Audio Precision or
Tektronix Inc
& Filing date:
1965
& Grant date:
1960 - 1969
& Cites :
Patent US 2922074A or
Patent US 4146844A
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