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| All Patents in class 361/145 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,180,680 | Apr. 25, 1916 | O.S. Walker | Apparatus for Controlling Magnetic Chucks | ||
| 1,853,642 | Apr. 12, 1932 | F.L. Simmons | Surge Control for Magnetic Chucks | ||
| 4,402,032 | Aug. 30, 1983 | B.W. Wilterdink | Electromagnet Power Supply and Demagnetizer | ||