| All Patents in class 73/1.65 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 295,093 | Mar. 11, 1884 | C.E. Ashcroft | Pressure-gage-testing apparatus | steam pressure gauges |
| 664,805 | Dec. 25, 1900 | C.B. Bosworth | Pressure-gage-testing apparatus | |
| 664,806 | Dec. 25, 1900 | C.B. Bosworth | Testing apparatus for pressure-gages | |
| 748,010 | Dec. 29, 1903 | S.G. Reed | Pressure Weighing Machine | pressure indicators |
| 821,988 | May 29, 1906 | C.H. Craig | Gage Testing Apparatus | testing machines |
| 1,134,316 | Apr. 06, 1915 | A.B. Collette | Testing Apparatus | testing machines |
| 1,154,018 | Sep. 21, 1915 | F.H. Hopkins | Dead Weight Gage Tester | testing machines |
