English: A drawing included in Georges de Ram's 1925 patent for "a shock absorber for the suspension arrangements of vehicles". US patent US1529878A. Depicts a design for a hydraulic lever arm type shock absorber.
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
Patent drawing by Georges de Ram depicting a "shock absorber for the suspension arrangements of vehicles"