US Patents

1. Three-Level Interface Control Circuit For Electronically Ballasted Lamp
   U.S. Patent No. 4,383,204, May 10, 1983
   
 
2. Fluorescent Lamp With Reduced Electromagnetic Interference
   U.S. Patent No. 4,409,521, October 11,1983
   
 
3. Integrated Multi-Stage Electrical Filter
   U.S. Patent No. 4,422,056, December 20, 1983
   
 
4. Capacitor Structure For Integrated Multi-Stage Filter
   U.S. Patent No.4,427,955, January 24, 1984
   
 
5. Amalgam Heating System For Solenoidal Electric Field Lamps
   U.S. Patent No. 4,437,041, March 13, 1984
   
 
6. Inter-Channel Isolation Scheme For Compact, Folded Discharge Lamps
   U.S. Patent No. 4,454,448, June 12, 1984
   
 
7. Resistive Lamp Ballast Re-Ignition Circuit
   U.S. Patent No. 4,536,680, August 20, 1985
   
 
8. Driver Circuit Controller For AC to AC Converters
   U.S. Patent No. 4,613,795, September 23, 1986  (with AM Itani)
   
 
9. Integrated Transformer and Inductor
   U.S. Patent No. 4,613,841, August 23, 1986
   
 
10. Electronic Ballast With Low Frequency AC to AC Converter
    U.S. Patent No. 4,614,898, September 30, 1986  (with AM Itani)
    
 
11. Drive and Control Circuits for Gate Capacitance Latch with Refresh Lamp Ballast
    U.S.Patent No. 4,677,346, June 30, 1987 (with JC Borowiec)
    
 
12. Operation of Standby Filament Associated with an AC Arc Discharge Lamp Ballast

U.S. Patent No. 4,709,188, November 24, 1987
 
13. Single Conductor Power Line Communications System
    U.S. Patent No. 4,714,912, December 22, 1987 (with JC Borowiec)
    
 
14. Reduced Requirement Energy Storage for Load Having Non-Zero Minimum Operating Potential
    U.S. Patent No.4,739,225, April 19, 1988 (with MD Bloomer & G Jernakoff)
    
 
15. High Efficacy Discharge Lamp Having Large Anodes
    U.S. Patent No. 4,902,933, February 20, 1990 
    
 
16. Combination Lamp and Integrating Sphere for Efficiently Coupling Radiant Energy from a Gas Discharge to a Lightguide
    U.S. Patent No. 4,950,059, August 21, 1990
    
 
17. Starting Electrodes for HID Lamps
    U.S. Patent No. 4,959,592, September 25, 1990 (with JM Anderson)
    
 
18. Discharge Lamp Using Acoustic Resonant Oscillations to Ensure High Efficiency
    U.S. Patent No. 4,983,889, January 8, 1991
    
 
19. Starting Aid for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent No. 5,047,693, September 10, 1991 (with SA El-Hamamsy)
    
 
20. Starting Aid for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent No. 5,084,654, January 28, 1992 (with SA El-Hamamsy)
    
 
21. Gas Probe Starter for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent No. 5,095,249, March 10, 1992 (with JT Dakin, ME Duffy & RA Heindl)
    
 
22. Feedback System for Stabilizing the Arc Discharge of a High Intensity Discharge Lamp
    U.S. Patent No. 5,134,345, July 28, 1992 (with SA El-Hamamsy)
    
 
23. Use of Silicon to Extend the Useful Life of Metal Halide Discharge Lamps
    U.S. Patent No. 5,136,214, August 4, 1992 (with DA Doughty & JL Myers)
    
 
24. Magnetically Tunable Starting Circuit for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent No. 5,175,476, December 29, 1992
    (with JM Anderson, GA Farrall, & JP Cocoma)
    
 
25. Method of Dosing a Discharge Lamp with Mercury
    U.S. Patent No. 5,213,537, May 25, 1993
    (with JT Dakin, WR Champman & BF Fenoglio)
    
 
26. Combination Lamp and Integrating Sphere for Efficiently Coupling Radiant Energy from a Gas Discharge to a Lightguide
    U.S. Patent No. Re. 34,492 (reissue of No. 4,950,059)
    
 
27. Electrostatic Shield to Reduce Wall Damage in an Electrodeless High Intensity Discharge Lamp
    U.S. Patent No. 5,438,235, August 1, 1995
    (with TJ Sommerer, HR Chang, A Klein, HL Witting & GA Farrall)
    
 
28. Virtual Fixture for Reducing Electromagnetic Interaction Between an Electrodeless Lamp and a Metallic Fixture
    U.S. Patent No. 5,461,284, October 24,1995.
    (with El-Hamamsy, Taubert & Mieskoski)
    
 
29. Systematic Configuration of Compact Fluorescent Lamps for Operation in a Single-Type Ballast
    U.S. Patent No. 5,834,884, November 10, 1998
    (with CJ Harsa, DJ Kachmarik and S Vamvakas)
    
 
30. Integrated Starting and Running Amalgam Assembly for an Electrodeless Fluorescent Lamp
    U.S. Patent No. 5,847,508, December 8, 1998. (with JC Borowiec and JP Cocoma)
    
 
31. Boil Dry Detection in Cooking Appliances
    U.S. Patent No. 6,469,282, October 22, 2002.
    
 
32. RF Induction Lamp with Ferrite Isolation System
    U.S. Patent No. 8,941,802, December 2, 2014.
    
 
33. Fast Start Dimmable Induction RF Fluorescent Light Bulb
    U.S. Patent No. 8,941,304, January 27, 2015.
    (With John Goscha, Walter Peter Lapatovich, David Allen Goodman and David Wentzel)
    
 
34. 35. RF Induction Lamp with Ferrite Isolation System
    U.S. Patent No. 8,901,842 B2, December 2, 2014
    
 
35. RF Induction Lamp with Isolation System for Air-Core Power Coupler
    U.S. Patent No. 8,975,829 B2, March 10, 2015. (With John Goscha)
    
 
36. Fast Start Induction RF Fluorescent Lamp with Burst-Mode Dimming
    U.S. Patent No. 9,245,734 B2, January 26, 2016. (With John Goscha, Walter Peter Lapatovich, David Allen Goodman, David Wentzel and Thomas Farkas)
    
 
37. High Frequency Induction Lighting
    U.S. Patent No. 9,305,765 B2, April 5, 2016
    (With John Goscha, Juan Manuel Rivas-Davila and Luke Christopher Raymond)
    
 
38. Induction RF Fluorescent Lamp with Load Control for External Dimming Device
    U.S. Patent No. 9,460,907 B2, October 4, 2016
    (With John Goscha and Thomas Farkas)
    
 
39. Induction RF Fluorescent Lamp with Processor-Based External Dimmer Load Control
    U.S. Patent No. 9,911,598 B2, March 6, 2018
    (With John Goscha, Thomas Farkas and Felix A. Alexandrov)
    
 
40. Inductive Lamp
    U.S. Patent No. D745,981 S, December 22, 2015. (With John Goscha)
    
 
41. Inductive Lamp
    U.S. Patent No. D745,982 S, December 22, 2015. (With John Goscha)
    
 
42. Inductive Lamp
    U.S. Patent No. D746,490 S, December 29, 2015. (With John Goscha)
    
 
43. Inductive Lamp
    U.S. Patent No. D747,009 S, January 5, 2016. (With John Goscha)
    
 
44. Inductive Lamp
    U.S. Patent No. D747,507 S, January 12, 2016. (With John Goscha)