Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882392 | Novel radiopaque heavy metal polymer complexes, compositions of matter and articles prepared therefrom | Johannes Smid, Alan Obligin, H. Ralph Rawls | 1989-11-21 |
| 4866132 | Novel radiopaque barium polymer complexes, compositions of matter and articles prepared therefrom | Alan Obligin, Du W. Xia, Ruth Silberman-Hazony, H. Ralph Rawls, Johannes Smid | 1989-09-12 |