Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6949887 | High frequency inductive lamp and power oscillator | Douglas A. Kirkpatrick | 2005-09-27 |
| 6552620 | Power oscillator | Douglas A. Kirkpatrick, Donald A. MacLennan | 2003-04-22 |
| 6313587 | High frequency inductive lamp and power oscillator | Donald A. MacLennan, Lauren E. Dymond, Jr., William G. Grimm, Kent Kipling, Douglas A. Kirkpatrick +5 more | 2001-11-06 |
| 6310443 | Jacketed lamp bulb envelope | Donald A. MacLennan, Brian Turner, Gary K. Bass, James T. Dolan, Kent Kipling +8 more | 2001-10-30 |
| 6225756 | Power oscillator | — | 2001-05-01 |