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| All Patents in class 188/204R | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,217,188 | Feb. 27, 1917 | E.R. Klemm | Braking device | motor vehicle brakes | |
| 1,603,894 | Oct. 19, 1926 | F.K. Benedict | Clamp screw for saw swages | saw swages | |
| 1,722,386 | Jul. 30, 1929 | C.H. Norton | Centerless Grinding Machine | grinding machines | |
| 1,945,048 | Jan. 30, 1934 | D.C. Klausmeyer | Electric rail clamp for mobile drills | radial drill presses | |
| 1,981,951 | Nov. 27, 1934 | W.F. Folmer | Adjustable Electrified Insect Screen | insect exterminators | |