Drilldown: Patents
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Patents > Office :
?? or
GB or
GR
& Full specification filed date:
1913
& National tech categories :
USPC 244/80 or
None
& IPCs :
IPC B64C1/00 or
IPC B64C3/18
& Number of text pages:
1-2
Use the filters below to narrow your results.
Showing below up to 2 results in range #1 to #2.