Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| H689 | Fuel pin | David W. Christiansen, Robert D. Leggett, Ronald B. Baker | 1989-10-03 |
| 4818479 | Nuclear reactor spacer grid and ductless core component | David W. Christiansen | 1989-04-04 |