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| All Patents in class 29/607 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 451,885 | May 05, 1891 | S.S. Wheeler | Method of constructing field-magnets of electric motors | |
| 1,336,928 | Apr. 13, 1920 | F.L. Simmons | Method and Apparatus for Alining Work on V Blocks and the Like for Magnetic Chucks | ||
| 1,970,922 | Aug. 21, 1934 | F.L. Simmons | Magnetic Chuck | ||