Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884754 | Process for producing fine copper flakes | Walter A. Johnson | 1989-12-05 |
| 4880170 | Process for producing fine copper powder with enhanced sinterability | Walter A. Johnson | 1989-11-14 |
| 4873148 | Coated metallic particles and process for producing same | Robert J. Holland | 1989-10-10 |
| 4847045 | Process for producing tungsten heavy alloy sheet | Walter A. Johnson | 1989-07-11 |
| 4844355 | Apparatus for milling metal powder to produce high bulk density fine metal powders | Robert J. Holland | 1989-07-04 |
| 4836850 | Iron group based and chromium based fine spherical particles | Walter A. Johnson | 1989-06-06 |
| 4832907 | Process for producing tungsten heavy alloy sheet | Walter A. Johnson, James R. Spencer | 1989-05-23 |
| 4818567 | Coated metallic particles and process for producing same | Robert J. Holland | 1989-04-04 |
| 4800064 | Process for producing tungsten heavy alloy sheet using hydrometallurgically produced tungsten heavy alloy | Walter A. Johnson, Nelson E. Kopatz | 1989-01-24 |