Image: 18941218 Bowling ball - U.S. Patent 531,103
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Description: Fig. 1 of U.S. Patent 531,103, titled "Bowling Ball", issued December 18, 1894. Bowling ball has thumb hole and a single finger hole.
Title: 18941218 Bowling ball - U.S. Patent 531,103
Credit: https://patents.google.com/patent/US531103A (Google patents)
Author: United States of America, U.S. Patent and Trademark Office, publishing the 1894 patent of inventor F. G. Dokkenwadel.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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