Drilldown: Patents
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- Airplane (18)
- Airship (15)
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- Event (141)
- Letters (683)
- Organizations (965)
- Patents (17611)
- Person (2131)
- Publications (24568)
- Techtypes (2379)
Patents > Office :
DE or
RU or
SU
& National tech categories :
DE 77h.6 or
USPC 244/153R or
USPC 244/80
& CPCs :
CPC B64C27/54 or
CPC B64C2700/6218
& Citations from after 1930:
None
& Number of text pages:
1-2
& Number of figures:
None
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.