Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251944 | Para-substituted phenylene derivatives | Barbara Chen, Helen Chen, Richard A. Haack, James W. Malecha, Thomas D. Penning +5 more | 2001-06-26 |
| 5952381 | Para-substituted phenylene derivatives | Barbara Chen, Helen Chen, Richard A. Haack, James W. Malecha, Thomas D. Penning +5 more | 1999-09-14 |