Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5060132 | Method of modeling and control for delignification of pulping | Ralph K. Johnson, Roger Kammerer, Azmi Kaya, Marion A. Keyes, IV | 1991-10-22 |
| 5032976 | System for modeling and control for delignification of pulping | Ralph K. Johnson, Roger Kammerer, Azmi Kaya, Marion A. Keyes, IV | 1991-07-16 |
| 5032977 | System for modeling and control for delignification of pulping | Ralph K. Johnson, Roger Kammerer, Azmi Kaya, Marion A. Keyes, IV | 1991-07-16 |
| 4990219 | Apparatus for controlling the degree of cooking in a digester | Ralph K. Johnson, Roger Kammerer, Azmi Kaya, Marion A. Keyes, IV | 1991-02-05 |
| 4978425 | Method for controlling the degree of cooking in a digester | Ralph K. Johnson, Roger Kammerer, Azmi Kaya, Marion A. Keyes, IV | 1990-12-18 |