Drilldown: Patents
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Patents > Inventors
:
Dan Knierim
or
Phil Crosby
& Filing date:
1986
& Grant date:
1980 - 1989
& Cites
:
Patent US 2883619A
or
Patent US 2922074A
or
Patent US 3011129A
or
Patent US 3312850A
or
Patent US 3426236A
or
Patent US 3689752A
or
Patent US 4048577A
or
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