US Patent: 379,445
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| Wrench
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Patentee:
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| Mathew E. Campfield (exact or similar names) - Pittsburgh, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Mar. 13, 1888 |
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Patent Pictures:
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M. E. Campfield patent March 13, 1888 |
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Stan Schulz
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Description: |
| Sliding jaw pipe wrench. Preliminary image taken from "Wrenches and Patents 1887-1898" by Don Shockley -- based on review of Patent Gazettes.
[May 2026: Patent was listed as "Withdrawn" in former version of U.S. Patent Office online database. Gets "null return" in current online version. Appears overstamped "CANCELLED" in official copy of "Specifications of Patents".]
The drawing looks similar to Campfield's April 10, 1888 patent (no. 380,859). |
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