Patent US-1921-1488243

Haw filed a number of patents related to propeller design in Europe between 1915 and 1919; here, in his (it seems) first American filing, he gives an unusually detailed list of his German, Austrian, and Hungarian patents, which are rolled together into this American version.

• Patent DE-1915-300200
• Patent DE-1916-309361
• Patent DE-1916-332539
• Patent DE-1916-332540
• Patent DE-1916-332541
• Patent DE-1919-332428
• Patent AT-1917-87219
• Patent AT-1917-87220
• Patent HU-1917-75493
• Patent HU-1917-76645

The core idea is that the propeller blades are formed of steel rods and interlocking cross-pieces, of wood or possibly synthetic material.

Sources

• Patent 1488243 document and bibliographic info on espacenet
• Patent 1488243 at google patents

Year filed	1921
Year granted	1924
Office	US
Patent number	1488243
Inventors	Jakob Haw
Inventor country	DE
Inventor location
Applicant person
Applicant firm
Applicant type	INDIV
Applicant is inventor?	1
Original title	Propeller for Aircraft
English title	Propeller for Aircraft
Tech fields	propeller
Filing date	1921-02-16
Full specification filed date
Application number
Grant date	1924-03-25
Granted?	1
Publication date
Supplementary to patent	Patent DE-1915-300200, Patent DE-1916-309361, Patent DE-1916-332539, Patent DE-1916-332540, Patent DE-1916-332541, Patent DE-1919-332428, Patent AT-1917-87219, Patent AT-1917-87220, Patent HU-1917-75493, Patent HU-1917-76645
Related to aircraft?	1
Serial number
Patent agent	William Wallace White
Assigned to
National tech categories
IPCs	IPC B64C11/16
CPCs	CPC B64C11/20
Family year	1915
First filing?	0
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages	6
Number of diagram pages	5
Number of figures	25
Number of claims	10