Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197342 | Use of biologically active glass as a drug delivery system | Leonard J. Litkowski, David C. Greenspan | 2001-03-06 |
| 6153221 | Use of biogically active glass as a drug delivery system | Leonard J. Litkowski, David C. Greenspan | 2000-11-28 |
| 5972384 | Use of biologically active glass as a drug delivery system | Leonard J. Litkowski, David C. Greenspan | 1999-10-26 |
| 5505922 | Anesthetic pharmaceutical combination | Michael D. Turner | 1996-04-09 |