Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819149 | Distributed control system | Paul S. Sanik, Dennis H. Shreve | 1989-04-04 |
| 4819248 | Electrode monitoring system | Glen F. Day | 1989-04-04 |
| 4812151 | Viscosity control in the manufacture of mineral fibers | Isac M. Sheinkop | 1989-03-14 |