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| All Patents in class 408/241G | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,504,192 | Aug. 05, 1924 | W.R. Fox | Drilling-machine-oiling system | ||
| 1,510,219 | Sep. 30, 1924 | R.B. Harding | Auger Guide | ||
| 1,659,978 | Feb. 21, 1928 | D.C. Klausmeyer | Telescopic Guard System for Drills | drill press accessories | |
| 3,824,890 | Jul. 23, 1974 | E.E. Johnson, W.D. Zettler | Chip Guard for Machine Tools | metalworking machine mechanisms | |
| 3,869,803 | Mar. 11, 1975 | M.E. Vaughan | Drill guide for enlarging engine valve stem guides | automotive tools | |