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| All Patents in class 74/509 | |||||
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| Number | Date | Patentee | Title | Type | |
| 528,211 | Oct. 30, 1894 | H.G. Sedwick | Slow Motion Attachment for Microscopes | ||
| 4,467,685 | Aug. 28, 1984 | R.H. Thorsell | Guard system for truss component cutting apparatus | truss making machines | |