Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880628 | Sustained release composition | William Maxwell Allen, Jr., Bernard F. Sansom, Havard J. Prosser, David M. Groffman | 1989-11-14 |
| 4873130 | Coating process for the preparation of coherent protective layer | John W. Nicholson | 1989-10-10 |
| 4836768 | Coated substrates | Havard J. Prosser, Anthony J. Dunsdon, John Skinner, Pauline J. Brookman | 1989-06-06 |