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| All Patents in class 346/34 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,042,385 | Oct. 29, 1912 | A.C. Bell | Signalling system | ||
| 1,046,182 | Dec. 03, 1912 | F. Hardinge | Signaling system | ||
| 2,748,665 | Jun. 05, 1956 | J.A. Sean | Machine Tool Positioning Mechanism | metalworking machine mechanisms | |