English: Malcolm Loughead's 1917 patent application for his hydraulic braking system
Date
Source
United States Patent and Trademark Office
Author
Malcolm Loughead
Licensing
Public domainPublic domainfalsefalse
The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)
The original patent contains no such notice, so its contents are in the public domain.
Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.
Captions
Malcolm Loughead's 1917 patent application for his hydraulic braking system