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| All Patents in class 74/89.44 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,573,551 | Feb. 16, 1926 | D.C. Klausmeyer | Peep Hole for Threads | radial drill presses | |
| 1,989,611 | Jan. 29, 1935 | B. Sassen, A.H. Dall | Wave Screw | metalworking power transmission | |
| 2,320,353 | Jun. 01, 1943 | M.E. Martellotti, H. Ernst | Power Transmission Mechanism | metalworking power transmission | |