Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870192 | Production of lactones and omega-hydroxycarboxylic acids | Clarence D. Chang | 1989-09-26 |
| 4846853 | Layered divalent metal hydrogen phosphates | Clarence D. Chang | 1989-07-11 |