US Patent: 1,727,623
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| Wrench
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Patentee:
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| William O. Thewes (exact or similar names) - North Ridgeville, OH |
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Patent Dates:
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| Applied: |
Jan. 11, 1928 |
| Granted: |
Sep. 10, 1929 |
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Patent Pictures:
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1 | 2 | 3
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William O. Thewes Pat. Sept. 10, 1929 |
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Stan Schulz
June & Dec 1937 RIDGID Pipe Wrench ads (FLICKR)
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Description: |
| The wrench is identical to the patent drawing. Earliest ads for this style show "PAT. PEND"G" markings and malleable iron handles; example shown in 2nd image is marked "RIDGID PAT 1727623 // RIDGE TOOL CO ELYRIA O U.S.A." Ads from 1937 demonstrate a modified appearance introduced during that year -- additional material added to the fixed jaw resulted in a "chevron," and Dec. 1937 ad includes "alloy handle" in the description.
The wrenches with this patent number have many features carried over from Thewes' Sept. 1, 1925 patent (no. 1,552,091). |
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