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| Patents for Jeffrey J. Plummer | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,553,738 | Nov. 19, 1985 | L.G. Adleman, J.J. Plummer | Cable pulling device with anti-reversing clutch | electrical conduit apparatus | |
| 4,555,093 | Nov. 26, 1985 | J.J. Plummer | Cable pulling device with force indicator and overload protection | electrical conduit apparatus | |