CH 235

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This category existed only from 1888 to 1889, then its patents were reclassified into the later system, Swiss patent classifications, 1890-1907. This wiki has 1 patents in category "CH 235".

Patents in category CH 235


Enclosing categories Swiss patent classifications, 1888-1889
Subcategories
Keywords Propulsion
Start year 1888
End year 1889