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| All Patents in class 470/81 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 7,262X | Oct. 25, 1832 | J.H. Shrader | Machine for cutting endless screws | ||
| 806,075 | Nov. 28, 1905 | T. Fawcus | Spiral Gear Cutting Machine | ||
 | 928,489 | Jul. 20, 1909 | W.G. Allen, R.G. Henry | Screw-thread-cutting mechanism | |
 | 945,901 | Jan. 11, 1910 | F.E. Anthony | Screw-cutting attachment | |
 | 1,273,421 | Jul. 23, 1918 | C.H. Taylor | Thread or worm cutter | |