Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6369521 | Starter circuit for an ion engine | Thomas K. Phelps | 2002-04-09 |
| 6369520 | Starter circuit for an ion engine | Thomas K. Phelps | 2002-04-09 |
| 6304040 | Starter circuit for an ion engine | Thomas K. Phelps | 2001-10-16 |
| 6181585 | Multiple output power supply circuit for an ion engine with shared upper inverter | Thomas K. Phelps | 2001-01-30 |
| 6154383 | Power supply circuit for an ion engine sequentially operated power inverters | — | 2000-11-28 |
| 6111358 | System and method for recovering power from a traveling wave tube | John A. Collins, Jr., Thomas K. Phelps, Xiaoling Zhai | 2000-08-29 |
| D389723 | Handle grip | Raymond C. Godard, Philip Remedios, Douglas F. Walker, Daniel J. Driscoll, Eliseo Ranalli | 1998-01-27 |
| 5218522 | D.C. chopper regulating method and apparatus incorporating bilateral regulating voltage path | Thomas K. Phelps, KHANH TUAN LE | 1993-06-08 |
| 4943903 | Power supply in which regulation is achieved by processing a small portion of applied power through a switching regulator | — | 1990-07-24 |