Drilldown: Patents
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- Companies (64)
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- Patents (1671)
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Patents > Filing date:
1980 - 1989
& Grant date:
1981
& Cites :
Patent US 3214516A or
Patent US 3325673A or
Patent US 3629731A or
Patent US 4255003A or
Other or
None
Use the filters below to narrow your results.
Showing below up to 6 results in range #1 to #6.