Drilldown: Patents
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Patents > Year granted:
1909
& Filing date:
1960 - 1969
& Granted :
Yes or
None
& Publication date:
1900 - 1999
& Citations from after 1930:
None
& Number of claims:
None
Use the filters below to narrow your results.
Showing below up to 3 results in range #1 to #3.