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| All Patents in class 318/9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,473,286 | Jun. 14, 1949 | A.W. Mall | Flexible shaft machine | ||
| 2,845,589 | Jul. 29, 1958 | J.H. Osgood | Electronic Table Motor Drive Unit for Optical Comparators and the Like | comparators | |
| 4,533,859 | Aug. 06, 1985 | R. Johnstone | Motorized Ball Nut | metalworking machine mechanisms | |