Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847605 | Picking in a graphics system | Robert M. Callahan, Edward C. Flickinger, Bruce C. Hempel, Bruce E. Whistance | 1989-07-11 |
| 4805117 | Method for controlling concatenation of transformation matrices in a graphics display system | Bruce C. Hempel, Gregory D. Laib, Bob C. Liang | 1989-02-14 |