Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5135185 | Wing mounted unducted fan engine | Wu-Yang Tseng | 1992-08-04 |
| 5010729 | Geared counterrotating turbine/fan propulsion system | Lawrence Butler, Robert A. Wall | 1991-04-30 |
| 4969325 | Turbofan engine having a counterrotating partially geared fan drive turbine | Robert A. Wall | 1990-11-13 |
| 4948339 | Propeller blade counterweight | — | 1990-08-14 |
| 4936748 | Auxiliary power source in an unducted fan gas turbine engine | Lawrence Butler | 1990-06-26 |
| 4916894 | High bypass turbofan engine having a partially geared fan drive turbine | Lawrence Butler | 1990-04-17 |
| 4913623 | Propeller/fan-pitch feathering apparatus | Jan Christopher Schilling, Julius Bathori, Neil Walker | 1990-04-03 |
| 4883240 | Aircraft propeller noise reduction | Philip R. Gliebe | 1989-11-28 |
| 4825648 | Turbofan engine having a split cowl | — | 1989-05-02 |
| 4296599 | Turbine cooling air modulation apparatus | — | 1981-10-27 |
| 4251987 | Differential geared engine | — | 1981-02-24 |
| 4222234 | Dual fan engine for VTOL pitch control | — | 1980-09-16 |
| 4222235 | Variable cycle engine | Elmore V. Sprunger | 1980-09-16 |