Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5793210 | Low noise MRI scanner | Robert Arvin Hedeen, Robert J. Dobberstein, Thomas Ebben, Scott T. Mansell, Kemakolam M. Obasih +3 more | 1998-08-11 |
| 5789678 | Method for reducing noise and/or vibration from multiple rotating machines | — | 1998-08-04 |
| 5726617 | Electrical transformer with reduced core noise | Imdad Imam, Frank Albert Pitman, Jr., Stephen Linwood Smith | 1998-03-10 |
| 5724017 | Electrical transformer with reduced core noise | Imdad Imam, Frank Albert Pitman, Jr., Stephen Linwood Smith | 1998-03-03 |
| 5710533 | Electrical transformer with reduced fan noise | Imdad Imam, Robert Arvin Hedeen, Frank Albert Pitman, Jr., Stephen Linwood Smith | 1998-01-20 |
| 5650623 | Perimeter sensing device | Ravi Rajamani | 1997-07-22 |
| 5618010 | Active noise control using a tunable plate radiator | Harindra Rajiyah | 1997-04-08 |
| 5590849 | Active noise control using an array of plate radiators and acoustic resonators | — | 1997-01-07 |
| 5584447 | Noise control using a plate radiator and an acoustic resonator | — | 1996-12-17 |
| 5558298 | Active noise control of aircraft engine discrete tonal noise | Harindra Rajiyah | 1996-09-24 |
| 5479813 | Sensor matching through real-time output compensation | Robert Arvin Hedeen | 1996-01-02 |
| 5463893 | Sensor matching through real-time output compensation | Robert Arvin Hedeen | 1995-11-07 |
| 5458222 | Active vibration control of structures undergoing bending vibrations | Harindra Rajiyah | 1995-10-17 |
| 5423658 | Active noise control using noise source having adaptive resonant frequency tuning through variable ring loading | Harindra Rajiyah, Anthony A. Renshaw, Robert Arvin Hedeen | 1995-06-13 |
| 5419198 | Electronic signal enhancement and separation for machinery diagnostics | — | 1995-05-30 |
| 5415522 | Active noise control using noise source having adaptive resonant frequency tuning through stress variation | Harindra Rajiyah, Anthony A. Renshaw, Robert Arvin Hedeen | 1995-05-16 |
| 5402669 | Sensor matching through source modeling and output compensation | Robert Arvin Hedeen | 1995-04-04 |
| 5391053 | Active noise control using noise source having adaptive resonant frequency tuning through variable panel loading | Harindra Rajivah, Anthony A. Renshaw, Robert Arvin Hedeen | 1995-02-21 |
| 5388956 | Fan assembly and method for reducing fan noise | Robert Arvin Hedeen | 1995-02-14 |
| 5382134 | Active noise control using noise source having adaptive resonant frequency tuning through stiffness variation | Harindra Rajiyah, Anthony A. Renshaw, Robert Arvin Hedeen | 1995-01-17 |
| 5370340 | Active control of aircraft engine noise using vibrational inputs | — | 1994-12-06 |
| 5221185 | Method and apparatus for synchronizing rotating machinery to reduce noise | George Charles Goodman | 1993-06-22 |