Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884820 | Wear resistant, abrasive laser-engraved ceramic or metallic carbide surfaces for rotary labyrinth seal members | Norman Louis Balmer | 1989-12-05 |
| 4826734 | Tungsten carbide-cobalt coatings for various articles | Robert W. Meyerhoff, Marianne O. Price, Jean M. Quets | 1989-05-02 |