Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6201457 | Notch filter incorporating saw devices and a delay line | — | 2001-03-13 |
| 6172582 | Saw resonator and ladder filter with specified number of reflector electrode fingers | — | 2001-01-09 |
| 6025762 | Delay line incorporating a surface acoustic wave ladder filter and method of providing same | Manas K. Roy, David Penunuri | 2000-02-15 |
| 5949306 | Saw ladder filter with split resonators and method of providing same | — | 1999-09-07 |
| 5638036 | Acoustic wave ladder filter with unequal series and shunt transducer periodicities and method of making | David Penunuri | 1997-06-10 |
| 5635883 | Acoustic wave filter with filter-shaping element and method | David Penunuri, Frederick Y. Cho | 1997-06-03 |
| 5600287 | Acoustic wave filter with reduced bulk-wave scattering loss, ladder filter incorporating same and method | Philip P. Kwan, David Penunuri | 1997-02-04 |
| 5471178 | Ladder filter and method for producing conjugately matched impedance | — | 1995-11-28 |
| 5434466 | Acoustic wave filter with reduced bulk-wave scattering loss and method | David Penunuri | 1995-07-18 |
| 5327626 | Method for processing robust acoustic reflectors | Frederick Y. Cho, David Penunuri | 1994-07-12 |
| 5313177 | Method and apparatus for an acoustic wave filter | David Penunuri | 1994-05-17 |
| 5296824 | Low loss wide bandwidth parallel channel acoustic filter | Frederick Y. Cho, David Penunuri | 1994-03-22 |
| 5270606 | Processing robust acoustic reflectors | Frederick Y. Cho, David Penunuri | 1993-12-14 |
| 5212420 | Method and apparatus for surface acoustic wave reflector grating | David Penunuri, Frederick Y. Cho | 1993-05-18 |
| 5162689 | Single-phase uni-directional acoustic wave transducer | Frederick M. Fliegel, David Penunuri | 1992-11-10 |