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| All Patents in class 235/1R | |||||
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| Number | Date | Patentee | Title | Type | |
| 25,423 | Sep. 13, 1859 | A. Lafever | Board Measure | ||
| 1,718,052 | Jun. 18, 1929 | W.C. Lineaweaver | Measuring Device | measurement gauges | |
| 3,180,573 | Apr. 27, 1965 | R.H. Damon, Jr., J.C. Merrill, B.C. Merrill | Recorder Mechanism Control Means | industrial recording apparatus | |