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| All Patents in class 33/555.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 664,995 | Jan. 01, 1901 | G. Ernst | Screw Thread Gage | thread gages | |
| 1,540,378 | Jun. 02, 1925 | R.B. Wasson | Micrometer End Clearance Machine | micrometers | |
| 2,609,610 | Sep. 09, 1952 | J.A. Elmes | Gauge for roll crowns | ||