Drilldown: Patents
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Patents > Applicant firm
:
Sperry Gyroscope Company
or
None
& Supplementary to patent
:
Patent DE-1895-98580
or
Patent GB-1909-8531
or
Patent GB-1911-29012
& National tech categories:
USPC 244/80
& Cites these patents:
Patent GB-1909-3202
& Citations from after 1930:
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