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| All Patents in class 188/134 | |||||
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| Number | Date | Patentee | Title | Type | |
| 714,916 | Dec. 02, 1902 | J.W. Kellogg | Automatic Clutch | vehicle clutches | |
| 1,533,281 | Apr. 14, 1925 | H.E. Tautz | Testing machine | ||
| 2,888,843 | Jun. 02, 1959 | J.C. Hollis | Machine Tool Turret With Bidirectional Coupling | tool changers and storage mechanisms | |