Drilldown: Patents
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- Patents (17514)
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Patents > Filing date:
1800 - 1899
& National tech categories:
USPC 244/27
& IPCs :
IPC B64B1/40 or
IPC B64C3/00 or
IPC B64C39/008
& Number of claims:
None
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.