Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858965 | Concentric injection flow pipe junction | Michael L. Shepard | 1989-08-22 |
| 4807340 | Concentric injection flow pipe junction fabrication method | Michael L. Shepard | 1989-02-28 |