Patent US-1917-1431520

• "Metallic" parts, CWH's general lifelong focus
• "One of the many features of the complete system is that all the members which transmit stresses to a given point in each truss an integral at such a point, thus developing the full strength of the members with a minimum weight of metal."
• Astonishing number of claims, perhaps more than any other patent. example
• Took nearly five years to grant --
• The granting of this patent was administratively delayed for an unusually long time.

Patent family descending from Patent US-1917-1431520

• Patent US-1917-1431520 (English title: Aeroplane, Filing date: 1917-10-24)
• Patent FR-1919-505186 (English title: Refinements to aeroplanes, Supplementary to patent: Patent US-1917-1431520, Filing date: 1919-08-28, National tech categories: FR 6.4)

Sources

• Patent 1431520 document and bibliographic info on espacenet
• Patent 1431520 at google patents

Year filed	1917
Year granted	1922
Office	US
Patent number	1431520
Inventors	Charles Ward Hall
Inventor country	US
Inventor location	Larchmont, Larchmont, NY, Westchester county, New York state
Applicant person	Charles Ward Hall
Applicant firm
Applicant type	INDIV
Applicant is inventor?	1
Original title	Aeroplane
English title	Aeroplane
Tech fields	airplane, design, metal, frame, fuselage, construction, stability
Filing date	1917-10-24
Full specification filed date
Application number	19820917
Grant date	1922-10-10
Granted?	1
Publication date
Supplementary to patent
Related to aircraft?	1
Serial number	198209
Patent agent	William B. Whitney
Assigned to
National tech categories
IPCs
CPCs	CPC B64C2700/6233, CPC B64C3/00
Family year	1917
First filing?	1
Cites these patents
Citations from after 1930
Application ID	48584273
INPADOC family ID	44136857
Number of text pages	11
Number of diagram pages	5
Number of figures	23
Number of claims	77