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Various Yo-Yo Patent Docs
Media
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Various Yo-Yo Patent Docs
By
The Curator
May 18, 2026
FOLIO — · MEDIA
Various yo-yo patents, including the “big one”, Haven & Hettrick’s 1866 patent.
Haven & Hettrick 1866 patent drawing
Caffrey centrifugal clutch patent (Yomega Brain, 1980)
Yomega ball-bearing patent (1999)
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YoYoExpert Trading Card Checklists
Various Yo-Yo Patent Docs
Various Newspaper Articles