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| Patents for Petersen Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,392,443 | Oct. 04, 1921 | W. Petersen | Wrench | locking pliers | |
| 1,489,458 | Apr. 08, 1924 | W. Petersen | Wrench | locking pliers | |
| 2,280,005 | Apr. 14, 1942 | W. Petersen | Wrench | locking pliers | |
| 2,514,130 | Jul. 04, 1950 | H.T. Jones | Locking Wrench and Pliers | locking pliers | |
| 2,563,267 | Aug. 07, 1951 | C. Petersen | Wrench Jaw | locking pliers | |
| 2,641,149 | Jun. 09, 1953 | C. Petersen | Gripping Tool | clamps | |