Drilldown: Patents

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Patents > Year granted: 1920 - 1929 & Inventor location: None & Supplementary to patent: Patent US-1918-1589780

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Year filed:
(There are no values for this filter)
Year granted:
1921 (1) · 1923 (1) · 1925 (1)
Office:
CA (1) · DE (1) · FR (1)
Inventors:
Charles Arthur Wragg (3) · Eugene Ludwig Greenewald (1)
Inventor country:
AU (3) · US (3)
Inventor location: (Click arrow to add another value)
Applicant person:
Charles Arthur Wragg (2) · Charles-Arthur Wragg (1) · Eugene Ludwig Greenewald (1)
Applicant firm:
None (3)
Applicant type:
INDIV (3)
Applicant is inventor:
Yes (3)
Tech fields:
None (3)
Filing date:
June 15, 1920 (1) · July 10, 1920 (1)
Full specification filed date:
None (3)
Application number:
None (3)
Grant date:
March 16, 1921 (1)
Granted:
Yes (3)
Publication date:
None (1) · 1921 (1) · 1925 (1)
Supplementary to patent: (Click arrow to add another value)
Related to aircraft:
1 (3)
Patent agent:
None (1) · Barlow et Gentizon (1) · Davis & Davis (1)
Assigned to:
None (3)
National tech categories:
None (1) · DE 77h.5 (1) · FR 6.4 (1)
IPCs:
None (1) · IPC B64C21/08 (1) · IPC B64C9/16 (1)
CPCs:
None (1) · CPC B64C13/30 (1) · CPC B64C9/16 (1) · CPC B64C9/18 (1) · CPC Y02T50/10 (1)
Family year:
1914 (1) · 1918 (2)
First filing:
No (3)
Cites these patents:
None (3)
Citations from after 1930:
None (3)
Number of text pages:
4 (1) · 5 (1) · 14 (1)
Number of claims:
7 (1) · 8 (1) · 10 (1)
Number of diagram pages:
2 (2) · 3 (1)
Number of figures:
8 (2) · 24 (1)

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