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| All Patents in class 142/51 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 24,642 | Jul. 05, 1859 | J. Irving | Machine for turning ovals | |
 | 33,334 | Sep. 24, 1861 | A.H. Brown | Improved machine for turning ovals | |
 | 78,919 | Jun. 16, 1868 | A.P. Bonte | Elliptical lathe | |
 | 94,130 | Aug. 24, 1869 | P. Pryibil | Oval lathe | |
 | 201,781 | Mar. 26, 1878 | H.C. Heckendorn | Improvement in oval-turning lathes | |
 | 1,100,130 | Jun. 16, 1914 | N. Grein | Woodworking-machine | |