Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868279 | Spiro(bis) indane copolyamide and preparation thereof | Thomas Link Guggenheim, Alice M. Colley, Joseph Guiles | 1989-09-19 |
| 4814496 | Spiro(bis)indane bis(carboxyphenyl ethers) and derivatives thereof | Thomas Link Guggenheim | 1989-03-21 |
| 4808754 | Spirobiindane bis-aminophenoxy ethers | Thomas Link Guggenheim, Joseph Guiles | 1989-02-28 |