Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883776 | Self-reinforced silicon nitride ceramic of high fracture toughness and a method of preparing the same | William J. Dubensky, Douglas B. Schwarz, Donald R. Beaman | 1989-11-28 |
| 4834938 | Method for making composite articles that include complex internal geometry | Jack J. Ott, Scott J. Jankowski | 1989-05-30 |