| All Patents in class 356/392 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 1,377,068 | May 03, 1921 | J. Hartness | Process of Inspecting and Gaging Screw Threads | thread gages |
| 1,703,933 | Mar. 05, 1929 | J. Hartness | Optical Comparator | comparators |
| 2,580,239 | Dec. 25, 1951 | R.O. Beardsley, L.B. Fuller, H.L. Murch | Comparator for Tracing Contours of Solid Objects | comparators |
| 2,621,556 | Dec. 16, 1952 | J.A. Allan, R.O. Beardsley | Comparator for Testing Turbine Blades and the Like | comparators |
| 2,780,956 | Feb. 12, 1957 | P.N. Welch, L.B. Fuller | Circle Tolerance Gauge for Optical Comparators | comparators |
| 2,799,206 | Jul. 16, 1957 | L.B. Fuller | Wide Range Optical Projection Contour Inspection System | comparators |
| 2,802,393 | Aug. 13, 1957 | A.D. Young | Inspection Method and Apparatus | comparators |
| 3,077,815 | Feb. 19, 1963 | A.J. Coakley | Optical Projection Contour Inspection System | comparators |
