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| All Patents in class 192/48.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 723,840 | Mar. 31, 1903 | A.L. De Leeuw | Controlling Switch System | machine tool controls | |
| 1,143,008 | Jun. 15, 1915 | C.E. Willey | Automobile or train lighting system | ||
| 2,619,880 | Dec. 02, 1952 | E.E. Hosea | Machine tool | milling machines | |