Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5921745 | Low head turbine | Viljo K. Valavaara | 1999-07-13 |
| 5720251 | Rotary engine and method of operation | Viljo K. Valavaara, Lixin Peng | 1998-02-24 |
| 5658138 | Rotary pump having inner and outer components having abutments and recesses | Viljo K. Valavaara, Lixin Peng | 1997-08-19 |