Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885103 | Cross-linking titanium & zirconium chelates & their use | Donald Edward Putzig | 1989-12-05 |
| 4808739 | Cross-linking titanium & zirconium chelates & their use | Donald Edward Putzig | 1989-02-28 |