| Patents for David I. McDonald |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 3,141,349 | Jul. 21, 1964 | D.I. McDonald | Ball Bearing Screw and Nut Mechanism | metalworking machine mechanisms |
| 3,221,404 | Dec. 07, 1965 | W.D. Averill, D.I. McDonald | Cutting Tool Adapter | tool changers and storage mechanisms |
| 3,273,182 | Sep. 20, 1966 | D.I. McDonald | Feed Control Device to Feed Tool Spindle at Rate of Tool Advance | machine tool controls |
| 3,599,279 | Aug. 17, 1971 | D.I. McDonald | Clamping Mechanism | coolant apparatus |
| 3,609,816 | Oct. 05, 1971 | D.I. McDonald | Hydraulic Clamping Mechanism | hydraulic apparatus |
