Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837232 | Dense skin ceramic structure and method of making the same | Harry R. Zwicker | 1989-06-06 |
| 4824008 | Surface bonding of ceramic bodies | Andrew W. Urquhart, Marc S. Newkirk | 1989-04-25 |