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| All Patents in class 470/134 | |||||
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| Number | Date | Patentee | Title | Type | |
| 28,279 | May 15, 1860 | Z.L. Jacobs | Screw Plate | tap and die holders | |
| 1,700,409 | Jan. 29, 1929 | H.K. Hyrup | Pipe-Thread Cleaner and Chaser | pipe and orifice cleaners | |