Drilldown: Patents
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- Techtypes (2385)
Patents > Year granted:
1900 - 1909
& Supplementary to patent
:
Patent DE-1897-112506
or
None
& National tech categories
:
BE K
or
DE 77h
or
USPC 244/3.23
or
USPC 244/45R
& Cites these patents
:
1887
or
Patent GB-1909-3202
or
None
& Number of text pages:
1
& Number of claims:
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