Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851355 | Hydrocarbon group-type analyzer system | Paul C. Hayes, Jr. | 1989-07-25 |
| 4826603 | Hydrocarbon group-type analyzer system | Paul C. Hayes, Jr. | 1989-05-02 |
| 4802986 | Hydrocarbon group-type analyzer system | Paul C. Hayes, Jr. | 1989-02-07 |