Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5706801 | Sensing and communications system for use with oxygen delivery apparatus | Larry Heyl, Dick Middleton | 1998-01-13 |
| D372529 | Portable oxygen dispenser | — | 1996-08-06 |
| 4475348 | Method and apparatus for filling cryogenic liquid cylinders | — | 1984-10-09 |