Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5502532 | Method and system for processing film by speed and activating agent concentration temperature control | Matthew M. Biesinger | 1996-03-26 |
| 4936982 | Intrachannel clarifier | David DiGregorio, Brent C. Black | 1990-06-26 |
| 4869818 | Orbital wastewater treatment system with combined surface aerator and submerged impeller | David DiGregorio, Frederick M. Riser | 1989-09-26 |
| 4303516 | Orbital wastewater treatment system with integral clarification | H. David Stensel, Peter Maier, David R. Refling, Ronald P. Klepper, John V. Maxham | 1981-12-01 |