Drilldown: Patents
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Patents > Year filed:
1916
& Application number :
25941D or
None
& National tech categories :
CH 129b or
DE 77 or
IT 8 or
USPC 244/80
& CPCs :
CPC B64C3/385 or
None
Use the filters below to narrow your results.
Showing below up to 4 results in range #1 to #4.