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| All Patents in class 474/69 | |||||
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| Number | Date | Patentee | Title | Type | |
| 352,368 | Nov. 09, 1886 | C.E. Skinner | Gas Engine Speeder | ignition systems | |
| 1,292,995 | Feb. 04, 1919 | C.H. Beach | Means for mounting sewing-machine motors | sewing machines | |
| 2,716,350 | Aug. 30, 1955 | R.D. Phares | Slow speed converter motor drive | metalworking speed changing mechanisms | |