Difference between revisions of "Patent FR-1909-397291"

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Seemingly mistitled in espacenet bibliography as "Improvements in and relating to electric discharge devices"
 
Seemingly mistitled in espacenet bibliography as "Improvements in and relating to electric discharge devices"
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Supplementary to German original filed 2 October 1908.
  
 
=== Sources ===
 
=== Sources ===

Revision as of 13:31, 18 April 2022

Seemingly mistitled in espacenet bibliography as "Improvements in and relating to electric discharge devices"

Supplementary to German original filed 2 October 1908.

Sources


Year filed 1908
Year granted 1909
Office FR
Patent number 397291
Inventors W.J. Hoffmann
Inventor country DE
Applicant person W.J. Hoffmann
Applicant firm
Applicant type
Applicant is inventor? 0
Original title Gouvernail de tête ou d'altitude pour aérostats
English title
Tech fields ignition
Filing date 1908-12-09
Full specification filed date
Application number 397291D
Grant date 1909-05-04
Granted? 1
Publication date
Supplementary to patent
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories FR 6.4
IPCs IPC B64B1/00, IPC H01J1/20
CPCs CPC B64B1/00, CPC H01J1/20
Family year 1908
First filing? 1
Cites these patents
Citations from after 1930
Application ID 19216682
INPADOC family ID 5295310
Number of text pages
Number of diagram pages
Number of figures
Number of claims