Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4936746 | Counter-rotation pitch change system | Edward H. Kusiak, Philip E. Barnes, Paul A. Carvalho | 1990-06-26 |
| 4756667 | Pitch control capacitance coupling | Albert J. Wyrostek | 1988-07-12 |
| 4348155 | Wind turbine blade pitch control system | Philip E. Barnes, Robert Sherman | 1982-09-07 |
| 4312244 | Power gearing | Philip E. Barnes | 1982-01-26 |