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| All Patents in class 33/501.45 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 129,536 | Jul. 16, 1872 | W.C. Cross | Stem Calipers | |
 | 1,186,075 | Jun. 06, 1916 | E.J. Bryant | Plug Gage | |
 | RE14,743 | Oct. 28, 1919 | E.J. Bryant | Plug Gage | |
| 1,487,834 | Mar. 25, 1924 | B.H. Blood | Reversible Gauge | ||
| 1,529,296 | Mar. 10, 1925 | B.H. Blood | Gauge | ||
| 2,470,755 | May 24, 1949 | A.H. Emery, E.H. Aldeborgh | Bore Gauge | ||
| 2,472,139 | Jun. 07, 1949 | A.H. Emery, E.H. Aldeborgh | Bore Gauge | ||