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| All Patents in class 192/70.29 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 712,575 | Nov. 04, 1902 | M.F. McMahon | Friction-clutch | |
| 900,397 | Oct. 06, 1908 | P.M. Lange | Friction Clutch | ||
| 1,601,235 | Sep. 28, 1926 | G.F. Kolb, E.P. Bullard, Jr. | Clutch | ||
| 1,665,554 | Apr. 10, 1928 | G.F. Kolb | Clutch | ||
| 1,683,528 | Sep. 04, 1928 | J.C. Carlton | Clutch Mechanism for Reversing Gear | ||
| 1,717,833 | Jun. 18, 1929 | G.F. Kolb, E.P. Bullard, Jr. | Clutch | ||