DescriptionAmusement ride with vertical track loop - figure 1.jpg
English: Figure 1 from Anton Schwarzkopf's patent for the Shuttle Loop roller coaster (patent US4165695, "Amusement ride with vertical track loop"). The image shows the overall layout of the ride.
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}}.
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