| All Patents in class 250/215 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 1,794,341 | Feb. 24, 1931 | M.K. Parkhurst | Optical Measuring Device |
| | 1,891,777 | Dec. 20, 1932 | A.G. Plimmer | Grinding Machine |
| | 1,986,915 | Jan. 08, 1935 | G.A. Biggs | Hydraulic Turbine |
 | 2,311,142 | Feb. 16, 1943 | F. Turrettini | Precision Machine Tool |
 | 2,406,299 | Aug. 20, 1946 | M. Koulicovitch | Machine Tool with Photoelectric Positioning of the Work Table |
 | 2,441,403 | May 11, 1948 | B.N. Engle, J.B. Engle | Teeth setter for saws |
| | 3,348,057 | Oct. 17, 1967 | R.K. Burroughs | Method and Apparatus for Checking the Straightness of Machine Tool Ways and the Like |
