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| All Patents in class 492/21 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 240,829 | May 03, 1881 | J.A. Kimball | Lathe Arbor and Polishing Coil | ||
 | 426,862 | Apr. 29, 1890 | S. Ross, Jr. | Sand-paper roll | |
 | 1,168,794 | Jan. 18, 1916 | J. Enoch | Expanding mandrel | |
| 1,913,261 | Jun. 06, 1933 | R.H. Brockman | Lathe Tool Holder | ||
 | 2,638,722 | May 19, 1953 | I.A. Rimmel | Mandrel | |