Patent GB-1909-13791

This is equal to Patent FR-1909-403665, which has an analogous offshoot pattern within the French system, as does Patent HU-1909-48375 within the Hungarian.

• Inventor location: Manufacturer, of Königs-Allee 52, Villencolonie Grunewald, near Berlin, Germany
• Patent agent: Clement Lean, B.Sc., A.M.I.Mech.E., Thanet House, 231-2, Strand, London, W.C.

Patent family descending from Patent GB-1909-13791

• Patent GB-1909-13791 (English title: Improvements in rotary fans or aerial propellers)
• Patent GB-1909-14409 (English title: Improved Rotary Fan or Propeller with Helical Blade Surfaces, Supplementary to patent: Patent GB-1909-13791)

Sources

• Neilson, 1910, Aeroplane Patents, p77
• Original patent document and bibliography entry on espacenet
• on google patents

Year filed	1909
Year granted	1909
Office	GB
Patent number	13791
Inventors	Hermann Ruthenberg
Inventor country	DE
Applicant person	Hermann Ruthenberg
Applicant firm
Applicant type	INDIV
Applicant is inventor?	Yes
Original title	Improvements in Rotary Fans or Propellers Adapted to Act upon the Air and the like
English title	Improvements in rotary fans or aerial propellers
Tech fields	aerial propellers, rotary fans
Filing date	1909/06/11
Full specification filed date
Application number	190913791D
Grant date	1910/02/03
Granted?	Yes
Publication date
Supplementary to patent
Related to aircraft?	1
Serial number
Patent agent	Clement Lean
Assigned to
National tech categories
IPCs	IPC B63H1/12, IPC B64C11/00
CPCs	CPC B64C11/006, CPC B63B2745/00, CPC B63H1/12, CPC B64C11/001, CPC B64C11/20
Family year	1909
First filing?	No
Cites these patents	1
Citations from after 1930
Application ID	23583567
INPADOC family ID	5905755
Number of text pages	3
Number of diagram pages	2
Number of figures	7
Number of claims	8