Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840911 | Use of sulfoxides for testing ionization detector system | Joseph Epstein, Frank E. Block, Jr. | 1989-06-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840911 | Use of sulfoxides for testing ionization detector system | Joseph Epstein, Frank E. Block, Jr. | 1989-06-20 |