Willems; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Willems; David A..The latest application filed is for "electromagnetic broadside energy probe with integral impedance matching".
- Willems; David A. - Leo IN
- Willems; David A. - Salem VA
- Willems; David A. - Hoagland IN
| Patent | Date |
|---|---|
| Electromagnetic broadside energy probe with integral impedance matching Grant 7,057,473 - Willems June 6, 2 | 2006-06-06 |
| Electromagnetic energy probe with integral impedance matching Grant 6,956,448 - Willems October 18, 2 | 2005-10-18 |
| Tunable microwave filter apparatus having a notch resonator Grant 5,406,234 - Willems April 11, 1 | 1995-04-11 |
| Broadband tight coupled microstrip line structures Grant 5,313,175 - Bahl , et al. May 17, 1 | 1994-05-17 |
| Microstrip twisted broadside coupler apparatus Grant 5,281,929 - Willems * January 25, 1 | 1994-01-25 |
| Broadband microstrip filter apparatus having inteleaved resonator sections Grant 5,278,529 - Willems January 11, 1 | 1994-01-11 |
| Microstrip transformer apparatus Grant 5,262,740 - Willems November 16, 1 | 1993-11-16 |
| High efficiency harmonic injection power amplifier Grant 5,172,072 - Willems , et al. December 15, 1 | 1992-12-15 |
| Active-type broadband power divider Grant 5,168,242 - Willems , et al. December 1, 1 | 1992-12-01 |
| Magnetostatic wave device unit Grant 4,714,904 - Willems December 22, 1 | 1987-12-22 |
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