Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 6946211 | Polymer electrolyte membrane fuel cells | Qingfeng Li, Hans Aage Hjuler | 2005-09-20 | |
| 6380444 | Process for the catalytic oxidation of hydrocarbons | Gang Xiao, Hans Aage Hjuler | 2002-04-30 | $1,084,000 |
| 6346186 | Method for electrochemical phosphating of metal surfaces | Erik Christensen, Thomas STEENBERG | 2002-02-12 | |
| 5344722 | Phosphoric acid fuel cell | Xiao Gang, Hans Aage Hjuler, Christian Olsen, Rolf W. Berg | 1994-09-06 |