Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7281383 | Reciprocating four-stroke Brayton refrigerator or heat engine | — | 2007-10-16 |
| 6495996 | Linear motor control with triac and phase locked loop | — | 2002-12-17 |
| 6483207 | Auto-centering linear motor | — | 2002-11-19 |
| 6266968 | Multiple evaporator refrigerator with expansion valve | — | 2001-07-31 |
| 6260368 | Evaporator superheat stabilizer | — | 2001-07-17 |
| 6118235 | Circuits for controlling reciprocation amplitude of a linear motor | — | 2000-09-12 |
| 5967488 | Electrically actuated reed valve | — | 1999-10-19 |
| 5753985 | Electric motor with oscillating rotary output and controlled amplitude | — | 1998-05-19 |
| 5592073 | Triac control circuit | — | 1997-01-07 |
| 5496153 | Method and apparatus for measuring piston position in a free piston compressor | — | 1996-03-05 |
| 5450521 | Pulse width modulator | — | 1995-09-12 |
| 5342176 | Method and apparatus for measuring piston position in a free piston compressor | — | 1994-08-30 |
| 5156005 | Control of stirling cooler displacement by pulse width modulation of drive motor voltage | — | 1992-10-20 |
| 5153587 | Monitor for instrument landing system | — | 1992-10-06 |
| 5148066 | Linear generator or motor with integral magnetic spring | William T. Beale | 1992-09-15 |
| 5068607 | Electrical linear position transducer with silicon steel foil shield surrounding transducer coil | Douglas Bliss | 1991-11-26 |
| 4926123 | Precision variable pitch compensation winding for displacement transducer | — | 1990-05-15 |
| 4912409 | Actuator displacement transducer having external flux excluding tube | Christopher G. Scheck | 1990-03-27 |
| 4907005 | Radiofrequency power distributor for instrument landing system localizer antenna arrays | — | 1990-03-06 |
| 4866378 | Displacement transducer with opposed coils for improved linearity and temperature compensation | — | 1989-09-12 |
| 4864232 | Temperature compensation for displacement transducer | — | 1989-09-05 |
| 4667158 | Linear position transducer and signal processor | — | 1987-05-19 |
| 4649283 | Multi-phase linear alternator driven by free-piston Stirling engine | David M. Berchowitz | 1987-03-10 |
| 4642547 | Adaptive regulation system for a linear alternator driven by a free-piston stirling engine | — | 1987-02-10 |
| 4605930 | Integral monitor for ILS localizer | — | 1986-08-12 |