Drilldown: Patents
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Patents > Year filed:
1916
& Application number:
None
& Supplementary to patent :
Patent DK-1916-21998 or
Patent FR-1907-373818
& National tech categories :
CH 129b or
DE 77 or
USPC 244/80
& CPCs :
CPC B64C3/385 or
None
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.