https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=58413&pn=579,210 Improvements In Adjustable Spanners Patentee: Bernard Forster - Manchester England Granted:1946-07-26

Combination tool incorporating adjustable wrench, hammer, nail claw, file, rule, etc. The description notes prior patent GB-399376, and claims this as an improvement. Produced in Britain and marketed internationally as UTILEX. The glass cutter shown in the patent is not found on known examples. Corresponding U.S. patent 2,528,128 was granted Oct. 31, 1950. Ron Geesin's "THE ADJUSTABLE SPANNER" (vol. 1) identifies Forster as the manufacturer.
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