Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325016 | Mercury vapor lamp with terbium-activated gadolinium borate luminescent layer | — | 1994-06-28 |
| 5312612 | Polymorphous luminescent compositions | John Frederick Ackerman | 1994-05-17 |