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| All Patents in class 29/249 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,420,729 | Jun. 27, 1922 | W.A. Peck, F.J. Moran | Pliers for valve-stem pins or locks | ||
 | 2,091,500 | Aug. 31, 1937 | I.J. Clark | Valve Tool | |