Drilldown: Patents
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Patents > Year filed:
1920 - 1929
& Applicant type:
INDIV
& Related to aircraft :
0? or
1
& Assigned to:
None
& National tech categories:
DE 77h.5
& Number of text pages:
2
& Number of claims:
2-3
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.