Drilldown: Patents
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Patents > Inventors :
Dan Knierim or
John Addis or
John Kobbe
& Grant date:
1990
& Cites :
... or
Patent US 3214631A or
Patent US 3312850A or
Patent US 3325673A or
Patent US 4255003A or
None
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Showing below up to 2 results in range #1 to #2.