Drilldown: Patents
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Patents > Year granted:
1920 - 1929
& Application number :
524791D or
None
& National tech categories :
FR 6.4 or
None
& IPCs :
IPC B64B1/40 or
IPC B64C3/00 or
IPC B64C31/06 or
IPC B64C33/00
Use the filters below to narrow your results.
Showing below up to 5 results in range #1 to #5.