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