FR545288A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Rotary helicopter
Assignee: Pierre Hees
•
Filing: 1921-12-28
•
Granted: 1922-10-09
•
Expires: 1941-12-28
Abstract
No abstract record available.
Inventors
- 👤 Pierre Hees
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 04:27
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04
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References Cited (Backward Citations)
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