Drilldown: Patents
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Patents > Year granted:
1912
& Applicant firm:
None
& Applicant type :
INDIV or
agent
& Publication date:
April 1912
& National tech categories :
AT 77d or
BE K or
DE 77h.5 or
None
& First filing:
No
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Showing below up to 4 results in range #1 to #4.