Drilldown: Patents
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Patents > Inventors :
Dan Knierim or
Gene Andrews or
Les Larson
& Filing date:
1980 - 1989
& Grant date:
1988
& Cites :
Patent US 2280531A or
Patent US 3215948A or
Patent US 3312850A or
Patent US 3325673A or
Patent US 3426236A or
Patent US 4048577A or
Patent US 4146844A or
None
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