Patent DE-1905-175477

From Inventing aviation
Revision as of 22:26, 23 October 2021 by Econterms (talk | contribs)
Jump to navigation Jump to search

Here is another patent on which the Patent Object on the Lilienthal website gives “Hofmann, Josef”, though the original only shows “J Hofmann”.

The title of the patent itself is simply “Schraubenpropeller”. The national tech classification which we would call DE 77h.6 is consistently printed on the original document. However, “Klasse 62c Gruppe 1” is pencilled in. This sort of thing happens on a few of Hofmann's German patent.

Sources


Year filed 1905
Year granted 1906
Office DE
Patent number 175477
Inventors Joseph Hofmann
Inventor country DE
Applicant person Joseph Hofmann
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Verbesserung der Schraubenpropeller nach Patent Nr. 141656
English title Improvement of screw propellers according to patent No. 141656
Tech fields Propellers, Propulsion, Airplane
Filing date 1905-06-05
Full specification filed date
Application number
Grant date 1906/09/29
Granted? 1
Publication date 1906/09/29
Supplementary to patent Patent DE-1902-141656
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories DE 77h.6, DE 62c.1
IPCs IPC B64C11/00
CPCs CPC B64C11/006
Family year 1902
First filing? 0
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages 2
Number of diagram pages 1
Number of figures 3
Number of claims 1