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| All Patents in class 266/132 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 125,650 | Apr. 09, 1872 | J.A. Woodbury | Improvement in Tempering Steel Railrod Rails | ||
| 2,129,463 | Sep. 06, 1938 | E.P. Bullard | Station Type Treatment Machine | ||
| 2,665,126 | Jan. 05, 1954 | E.G. Roehm | Crankshaft Pin Hardening Machine | ||
| 3,604,691 | Sep. 14, 1971 | W.G. Sherwood | Apparatus and method for coiling and quenching rod | ||