Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7947177 | Pressure vessels for holding cylindrical filtration cartridges | Douglas Eisberg, Terry E. Gilbertson, John Mazrum | 2011-05-24 |
| 6558544 | Pressure vessels for holding cylindrical semipermeable membrane cartridges | Douglas Eisberg, Robert A. Uhlinger, Terry E. Gilbertson | 2003-05-06 |
| D468392 | Pressure vessel locking ring | Douglas Eisberg | 2003-01-07 |