Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8439640 | Propeller blade pitch control system | Robert H. Perkinson | 2013-05-14 |
| 8162611 | Controllable pitch propeller with electrical power generation | Robert H. Perkinson | 2012-04-24 |
| 8133027 | Integrated actuator for a propeller system | Paul A. Carvalho | 2012-03-13 |
| 8118562 | Sacrificial blade tip | Mark Raes | 2012-02-21 |
| 7871035 | Propulsion system for an airship or hybrid aircraft | — | 2011-01-18 |
| 7442009 | Driving device for raising or lowering an airfoil | — | 2008-10-28 |
| 6981844 | Cyclic actuation system for a controllable pitch propeller and a method of providing aircraft control therewith | Robert H. Perkinson, Paul A. Carvalho | 2006-01-03 |
| 6811376 | Actuation system for a controllable pitch propeller | Robert H. Perkinson, David R. Danielson | 2004-11-02 |
| 6769874 | Permanent magnet alternator for a gas turbine engine | — | 2004-08-03 |
| 6753513 | Propeller de-icing system | Joshua I. Goldberg | 2004-06-22 |
| 5897293 | Counterweighted propeller control system | Robert H. Perkinson, Charles L. DeGeorge | 1999-04-27 |
| 5865599 | System and process for direct blade angle measurement in propulsion systems | Robert W. Pruden, Harry R. Paquin, III, Geoffrey Wolfe | 1999-02-02 |