Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6602045 | Wingtip windmill and method of use | — | 2003-08-05 |
| 5931640 | Oppositely skewed counter-rotating fans | Robert J. Van Houten | 1999-08-03 |
| 5489186 | Housing with recirculation control for use with banded axial-flow fans | Martin G. Yapp, Robert Houten | 1996-02-06 |
| 5297931 | Forward skew fan with rake and chordwise camber corrections | Martin G. Yapp, Robert J. Van Houten | 1994-03-29 |