Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9890905 | Method and system for filling a gas cylinder | Darrill L. Plummer, Marvin Carroll | 2018-02-13 |
| 9310024 | Method and system for filling a gas cylinder | Darrill L. Plummer, Mavin Carroll | 2016-04-12 |
| 7415995 | Method and system for independently filling multiple canisters from cascaded storage stations | Darrill L. Plummer | 2008-08-26 |