| All Patents in class 409/239 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
| | 1,028,295 | Jun. 04, 1912 | T.B. Williams, F.L. Smith | Valve-seat-dressing tool |
| | 2,192,856 | Mar. 05, 1940 | L.F. Nenninger | Spindle Construction |
| | 2,890,629 | Jun. 16, 1959 | R.F. Hecker, G.H. Schurger | Machine Tool |
| | 3,045,510 | Jul. 24, 1962 | W.E. Brainard | Machine Slide Position Error Sensing and Compensation Mechanism |
| | 3,131,584 | May 05, 1964 | E.L. McFerren | Horizontal Boring Machine |
| | 3,221,605 | Dec. 07, 1965 | J.V. Hemmerle, Jr. | Thermal Change Compensation Mechanism |
| | 3,227,047 | Jan. 04, 1966 | F. Schultheiss, G.H. Jones | Anti Sag Underarm for Horizontal Boring, Drilling and Milling Machines and the Like |
| | 3,429,224 | Feb. 25, 1969 | J.G. Osburn | Temperature Compensated Spindle Positioner |
