Drilldown: Patents
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Patents > Office
:
AT
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IT
or
NZ
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RU
or
US
& Filing date:
1880 - 1889
& National tech categories
:
IT 8
or
USPC 244/153R
or
USPC 244/22
or
USPC 244/80
& Cites these patents:
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Showing below up to 11 results in range #1 to #11.
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