Drilldown: Patents
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Patents > Year filed:
1920 - 1929
& Inventor country :
DE or
IT or
NL
& Application number:
None
& Assigned to :
Sperry Gyroscope Company or
Western Electric Company or
None
& CPCs:
CPC B64C9/02
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.