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| All Patents in class 33/412 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 600,049 | Mar. 01, 1898 | F.A. Thompson | Calipers | |
 | 868,074 | Oct. 15, 1907 | E.E. Clark | Shaft Liner and Leveler | |
 | 1,598,248 | Aug. 31, 1926 | S.S. Paine | Measuring Gauge for Rolls | |
 | 1,799,739 | Apr. 07, 1931 | J.B. Elfring, C.G. Schiele | Precision measuring device | |
 | 3,525,158 | Aug. 25, 1970 | D.L. Torlay | Apparatus for Alining Shafts and the Like | |