Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844944 | Lightweight, durable plumbing fixture fabricated from a delamination-resistant multilayer polymeric composite | Peter U. Graefe | 1989-07-04 |
| 4844955 | Multilayer polymeric composite and method for its manufacture | Peter U. Graefe | 1989-07-04 |