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| Patents for Petersen Mfg. Co., Inc. | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,541,312 | Sep. 17, 1985 | C. Petersen | Long Nose Locking Plier | locking pliers | |
| 4,546,680 | Oct. 15, 1985 | C. Petersen | Long Nose Locking Pliers | locking pliers | |
| 4,709,601 | Dec. 01, 1987 | C. Petersen | Long Nose Locking Pliers | locking pliers | |
| 4,730,524 | Mar. 15, 1988 | C. Petersen | Long Nose Locking Plier | locking pliers | |
| 5,005,449 | Apr. 09, 1991 | D.L. Gatzemeyer, J.A. Sorensen | Hand Tool or Improved Bar Clamp | clamps | |