Drilldown: Patents
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Patents > Office
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or
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US
& Filing date:
December 31, 1969
& Grant date:
3900 - 3999
& Supplementary to patent
:
Patent BE-1907-199348
or
None
& National tech categories:
USPC 244/45R ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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