Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5682750 | Self-contained liquid natural gas filling station | Michael Lutgen, Tom Drube, Paul Drube, Tom Chrisfield | 1997-11-04 |
| 5616838 | Metering apparatus for cryogenic liquids | Tom Drube, Paul Drube | 1997-04-01 |