Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884939 | Self-contained laser-activated depth sensor for excavator | — | 1989-12-05 |
| 4866641 | Apparatus and method for controlling a hydraulic excavator | Timothy E. Steenwyk | 1989-09-12 |
| 4829418 | Apparatus and method for controlling a hydraulic excavator | Timothy E. Steenwyk | 1989-05-09 |
| 4805086 | Apparatus and method for controlling a hydraulic excavator | Timothy E. Steenwyk | 1989-02-14 |