| Patents for Richard Johnstone |
Patents 31 -
36
of 36
      |
| Number | Date | Patentee | Title | Type |
| CA-1,197,594 | Dec. 03, 1985 | E.E. Kirkham, R. Johnstone | Adaptive control system for machine tool or the like | machine tool controls |
| CA-1,214,850 | Dec. 02, 1986 | L.D. Ostby, H. Chung, E.E. Kirkham, R. Johnstone | Automatic dynamic error compensator | machine tool controls |
| 4,628,441 | Dec. 09, 1986 | L.D. Ostby, H. Chung, E.E. Kirkham, R. Johnstone | Automatic Dynamic Error Compensator | metalworking machine mechanisms |
| CA-1,220,018 | Apr. 07, 1987 | R. Johnstone | Motorized ball nut | metalworking machine mechanisms |
| 4,784,894 | Nov. 15, 1988 | E.J. Hummelt, E.E. Kirkham, R. Johnstone | Molded polymer composite | |
| 5,066,176 | Nov. 19, 1991 | R. Johnstone | Probe for Machine Tool | metalworking machine mechanisms |
