Drilldown: Patents
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Patents > Filing date:
1916
& Supplementary to patent
:
Patent FR-1911-430455
or
Patent GB-1909-12556
or
Patent NO-1915-12-15 Carl Alfred Johansson
& National tech categories
:
DE 77h
or
USPC 244/45R
or
USPC 244/80 ![](/aero/extensions/Cargo/drilldown/resources/filter-x.png)
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Showing below up to 1 result in range #1 to #1.