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| All Patents in class 33/23.07 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,362,182 | Dec. 14, 1920 | F.W. Potter | Lathe for Cutting Irregular Objects | ||
| 1,462,101 | Jul. 17, 1923 | E.G. Colson | Tool | ||
 | 1,668,927 | May 08, 1928 | J. Stumpf | Noncondensing steam engine | |
 | 2,086,153 | Jul. 06, 1937 | C.A. Bickel | Apparatus for Control of Machine Tools | |