https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85656&pn=2,773,574 Ratchet adapters for socket wrenches Patentee: Edward T. Able - Denver Co. Granted:1956-12-11

Reversible ratchet structure; a 1954 trade journal item suggests this was produced as a heavy duty ratchet adapter for 3/4" drive sockets. Patent nos. 855,292 , 895,713, 1,845,667 and 2,407,558 listed as references.
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