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| All Patents in class 74/664 | |||||
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| Number | Date | Patentee | Title | Type | |
| 281,813 | Jul. 24, 1883 | A.O. Wilson | Traction Engine | steam traction engines | |
| 333,360 | Dec. 29, 1885 | J.W. Terman | Traction Engine | traction engine brakes | |
| 2,495,312 | Jan. 24, 1950 | T. Foster, S.A. Bradenburg, C.A. Bickel | Power Unit for Machine Tools | metal lathe accessories and attachments | |
| 2,505,856 | May 02, 1950 | A.T. Gregory | Gearing for internal-combustion engines | ||