File:19560731 Bowling pin-setting mechanism - U. S. Patent 2,757,000.png: Revision history

From HandWiki

Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

Retrieved from "https://handwiki.org/wiki/File:19560731_Bowling_pin-setting_mechanism_-_U._S._Patent_2,757,000.png"