Drilldown: Patents
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Patents > Year granted:
1918
& Office :
AT or
DE or
GR or
MX
& Supplementary to patent :
Patent BE-1907-199348 or
None
& National tech categories :
DE 77h.9 or
USPC 244/30
Use the filters below to narrow your results.
Showing below up to 5 results in range #1 to #5.