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| Patents for American Telephone & Telegraph Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,318,088 | Oct. 07, 1919 | C.S. Klein | Combination Tool | socket wrenches | |
| 1,334,674 | Mar. 23, 1920 | A. Panitti, Jr. | Right angle Ratchet Screwdriver | ratcheting screwdrivers | |
| 1,663,748 | Mar. 27, 1928 | R.J. Kent, H.D. Bender | Braid Stripper For Insulated Wires | auxiliary wrenches | |