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| All Patents in class 235/458 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,710,934 | Jun. 14, 1955 | J.A. Senn | Motor Controlled Machine Tool Positioning Mechanism | ||
| 4,154,396 | May 15, 1979 | E.E. Kirkham | Digital Data Reader | ||