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| All Patents in class 200/61.41 | |||||
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| Number | Date | Patentee | Title | Type | |
| 912,734 | Feb. 16, 1909 | A.W. Roovers | Coin controlled electrical apparatus | ||
| 3,044,508 | Jul. 17, 1962 | C.A. Sherman | Mark sensing lumber defect cutter | specialty woodworking machines | |
| 3,982,085 | Sep. 21, 1976 | J.H. Cox | Stock Sensing Device | machine tool controls | |