Drilldown: Patents
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Patents > Inventor country :
GB or
NL or
US or
None
& Filing date:
1910 - 1919
& Supplementary to patent :
Patent FR-1907-373818 or
None
& Assigned to:
None
& National tech categories :
USPC 244/30 or
USPC 244/80
& Number of figures:
7
Use the filters below to narrow your results.
Showing below up to 7 results in range #1 to #7.