Drilldown: Patents
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Choose a table:
- Airplane (18)
- Airship (15)
- Companies (480)
- Event (141)
- Letters (683)
- Organizations (967)
- Patents (17619)
- Person (2160)
- Publications (24571)
- Techtypes (2386)
Patents > Year granted:
1924
& Office
:
CA
or
CH
or
DE
or
DK
& National tech categories
:
DE 77h.2
or
DE 77h.5
or
USPC 244/22
& IPCs:
IPC B64C3/56
& Citations from after 1930:
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Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.