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| All Patents in class 341/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,803,448 | Aug. 20, 1957 | L.B. Biebel | Computing scale | ||
| 2,853,664 | Sep. 23, 1958 | P.L. Jones, D.S. Evans, V.W. Towns | Digital Servosystem for Postioning an Adjustable Member | machine tool controls | |
| 3,139,612 | Jun. 30, 1964 | K.C. Allen | Scale | ||