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| All Patents in class 470/209 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,694,229 | Dec. 04, 1928 | J.P. Nestor | Thread restorer | ||
| 1,700,409 | Jan. 29, 1929 | H.K. Hyrup | Pipe-Thread Cleaner and Chaser | pipe and orifice cleaners | |
| 1,884,460 | Oct. 25, 1932 | J.H. Williams | Facing Tool | facing heads | |
| 1,998,557 | Apr. 23, 1935 | R. Sannipoli | Fruit Jar Cap Wrench and Rethreader | jar wrenches | |