Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826510 | Portable low profile DC oxygen concentrator | — | 1989-05-02 |
| D284695 | Oxygen concentrator | — | 1986-07-15 |
| D284026 | Oxygen concentrator | — | 1986-05-27 |
| D282547 | Large capacity, modular, oxygen concentrator | — | 1986-02-11 |
| 4561865 | Single bed pressure swing adsorption gas separation system | Ravinder K. Bansal | 1985-12-31 |
| 4511377 | Apparatus for the production of oxygen | — | 1985-04-16 |
| 4509959 | Modular industrial oxygen concentrator | — | 1985-04-09 |
| D275045 | Combined bed and control unit for an industrial oxygen concentrator or the like | — | 1984-08-07 |
| D273717 | Compact medical oxygen concentrator | — | 1984-05-01 |
| 4441506 | Respiratory exerciser | Grace N. McCombs | 1984-04-10 |
| D269124 | Respiratory exerciser | Grace N. McCombs | 1983-05-24 |
| 4378982 | Compact oxygen concentrator | — | 1983-04-05 |
| 4373938 | Modular industrial oxygen concentrator | — | 1983-02-15 |
| 4371384 | Bed vessels for a compact oxygen concentrator | — | 1983-02-01 |
| 4342573 | Compact oxygen concentrator | John Schlaechter | 1982-08-03 |
| 4302224 | Compact oxygen concentrator | John Schlaechter | 1981-11-24 |
| D261676 | Compact oxygen concentrator | — | 1981-11-03 |
| 4263018 | Pressure swing adsorption process and system for gas separation | Edward E. Vrana | 1981-04-21 |
| 4194890 | Pressure swing adsorption process and system for gas separation | Edward E. Vrana | 1980-03-25 |