Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885028 | Process for producing prealloyed tungsten alloy powders | Nelson E. Kopatz, Walter A. Johnson, Howard H. Shaw | 1989-12-05 |
| 4816067 | Process for producing fine spherical particles | Nelson E. Kopatz | 1989-03-28 |