Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845034 | Biochemically reacting substrates in subterranean cavities | Ernest E. Kern, Kermit Allen, O. C. Karkalits, Donald L. Wise, Alfred P. Leuschner | 1989-07-04 |
| 4826769 | Biochemically reacting substrates in subterranean cavities | — | 1989-05-02 |