Drilldown: Patents
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Patents > Year granted:
1918
& Office :
AT or
DE or
GR or
HU
& Supplementary to patent:
None
& National tech categories :
DE 77h.9 or
FR 6.4 or
USPC 244/30
& CPCs:
None
Use the filters below to narrow your results.
Showing below up to 1 result in range #1 to #1.