Drilldown: Patents
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Patents > Year filed:
1913
& National tech categories
:
DE 77h
or
USPC 244/153R
or
USPC 244/90R
& Cites these patents
:
Patent AT-1909-47911
or
Patent GB-1909-25116
or
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Use the filters below to narrow your results.
None (6) ·
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Showing below up to 12 results in range #1 to #12.