Drilldown: Patents
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Patents > Filing date:
1800 - 1899
& Supplementary to patent :
Patent FR-1891-216860 or
Patent FR-1910-423792 or
None
& CPCs :
CPC B64C23/005 or
CPC F42B10/30
& Number of text pages:
None
Use the filters below to narrow your results.
Showing below up to 6 results in range #1 to #6.