Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9236050 | System and method for improving speech recognition accuracy in a work environment | — | 2016-01-12 |
| 5234595 | Two-phase orbital-type wastewater treatment system and method | David Berry | 1993-08-10 |
| 5078869 | Clarifier cleaning apparatus | Brent C. Black | 1992-01-07 |
| 4940545 | Aerobic waste sludge digester-thickener orbital system and method | Richard J. Eismin, Frederick M. Riser | 1990-07-10 |
| 4936982 | Intrachannel clarifier | Mark G. Biesinger, Brent C. Black | 1990-06-26 |
| 4869818 | Orbital wastewater treatment system with combined surface aerator and submerged impeller | Mark G. Biesinger, Frederick M. Riser | 1989-09-26 |
| 4275020 | Gas-liquid dissolving tank | Daniel McCarthy, Keith J. Mounteer, Charles D. Thompson | 1981-06-23 |