| All Patents in class 356/397 |
Patents 1 -
5
of 5
      |
| Picture | Number | Date | Patentee | Title |
| | 865,709 | Sep. 10, 1907 | W.H. Johnson | Device for Measuring Heights of Persons |
| | 1,377,068 | May 03, 1921 | J. Hartness | Process of Inspecting and Gaging Screw Threads |
| | 1,480,390 | Jan. 08, 1924 | J. Hartness | Apparatus for Inspecting and Gauging Screw Threads |
| | 1,732,730 | Oct. 22, 1929 | R.W. Porter | Method and Apparatus for Measuring and Comparing Gears and the Like |
| | 2,780,956 | Feb. 12, 1957 | P.N. Welch, L.B. Fuller | Circle Tolerance Gauge for Optical Comparators |
