Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5131603 | Rotary wing aircraft split segmented duct shrouded propeller tail assembly | — | 1992-07-21 |
| 4591112 | Vectored thrust airship | Frank N. Piasecki | 1986-05-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5131603 | Rotary wing aircraft split segmented duct shrouded propeller tail assembly | — | 1992-07-21 |
| 4591112 | Vectored thrust airship | Frank N. Piasecki | 1986-05-27 |