Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6247743 | Coverlet for the rear portion of a vehicle having a roll bar | — | 2001-06-19 |
| 4702798 | Process for recovering dry solids from aqueous solids mixtures | — | 1987-10-27 |
| 4662990 | Apparatus for recovering dry solids from aqueous solids mixtures | — | 1987-05-05 |
| 4608120 | Apparatus for removing light oil from solids | Charles Greenfield, Robert E. Casparian | 1986-08-26 |
| 4518458 | Process for removing light oil from solids | Charles Greenfield, Robert E. Casparian | 1985-05-21 |
| RE31185 | Process and apparatus for dehydrating waste solids concentrates | Charles Greenfield | 1983-03-22 |
| 4336101 | Process and apparatus for recovering clean water and solids from aqueous solids | Charles Greenfield, Robert E. Casparian | 1982-06-22 |
| 4289578 | Process and apparatus for recovering clean water and solids from aqueous solids | Charles Greenfield, Robert E. Casparian | 1981-09-15 |
| 4276115 | Process and apparatus for dehydrating waste solids concentrates | Charles Greenfield | 1981-06-30 |
| 4270974 | Process and apparatus for recovering clean water and solids from aqueous solids | Charles Greenfield, Robert E. Casparian | 1981-06-02 |