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| Patents for Diamond Calk Horseshoe Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,818,758 | Jan. 07, 1958 | J.F. Cooper, Jr., W.H. Connell, J.E. Swanstrom | Spring Loaded Plier Type Tool | pliers | |
| 2,849,908 | Sep. 02, 1958 | S.E. Swanson, J.F. Cooper, Jr., W.H. Connell, J.E. Swanstrom | Locking Open End Wrench with Lock Retaining Means | screw adjust wrenches | |
| 2,869,409 | Jan. 20, 1959 | W.H. Connell, J.E. Swanstrom, S.E. Swanson, J.F. Cooper | Slidable Jaw Wrench with Worm Latching Means | screw adjust wrenches | |