Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882367 | Articles of filled synthetic polymeric materials and glass bead filler therefore | — | 1989-11-21 |
| 4879321 | Articles of filled synthetic polymeric materials and glass bead filler therefor | — | 1989-11-07 |
| 4818574 | Process of forming a refractory mass and mixture of particles for forming such a mass | Leon-Philippe Mottet, Pierre Robyn | 1989-04-04 |