Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678952 | Concrete dowel placement apparatus | Lee A. Shaw | 1997-10-21 |
| 5668417 | Method and apparatus for distinguishing between failure of a power supply versus failure of its power source from the secondary of the power supply | Nathan Wiscombe | 1997-09-16 |