US Patents - Victor D. Roberts





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  1. Three-Level Interface Control Circuit For Electronically Ballasted Lamp
    U.S. Patent #4,383,204, May 10, 1983
    2.  
  2. Fluorescent Lamp With Reduced Electromagnetic Interference
    U.S. Patent #4,409,521, October 11,1983
    3.  
  3. Integrated Multi-Stage Electrical Filter
    U.S. Patent #4,422,056, December 20, 1983
    4.  
  4. Capacitor Structure For Integrated Multi-Stage Filter
    U.S. Patent #4,427,955, January 24, 1984
    5.  
  5. Amalgam Heating System For Solenoidal Electric Field Lamps
    U.S. Patent #4,437,041, March 13, 1984
    6.  
  6. Inter-Channel Isolation Scheme For Compact, Folded Discharge Lamps
    U.S. Patent #4,454,448, June 12, 1984
    7.  
  7. Resistive Lamp Ballast Re-Ignition Circuit
    U.S. Patent #4,536,680, August 20, 1985
    8.  
  8. Driver Circuit Controller For AC to AC Converters
    U.S. Patent #4,613,795, September 23, 1986  (with AM Itani)
    9.  
  9. Integrated Transformer and Inductor
    U.S. Patent #4,613,841, August 23, 1986
    10.  
  10. Electronic Ballast With Low Frequency AC to AC Converter
    U.S. Patent #4,614,898, September 30, 1986  (with AM Itani)
    11.  
  11. Drive and Control Circuits for Gate Capacitance Latch with Refresh Lamp Ballast
    U.S.Patent #4,677,346, June 30, 1987 (with JC Borowiec)
    12.  
  12. Operation of Standby Filament Associated with an AC Arc Discharge Lamp Ballast 

    13. U.S. Patent #4,709,188, November 24, 1987
     
  13. Single Conductor Power Line Communications System
    U.S. Patent #4,714,912, December 22, 1987 (with JC Borowiec)
    14.  
  14. Reduced Requirement Energy Storage for Load Having Non-Zero Minimum Operating Potential
    U.S. Patent #4,739,225, April 19, 1988 (with MD Bloomer & G Jernakoff)
    15.  
  15. High Efficacy Discharge Lamp Having Large Anodes
    U.S. Patent #4,902,933, February 20, 1990 
    16.  
  16. Combination Lamp and Integrating Sphere for Efficiently Coupling Radiant Energy from a Gas Discharge to a Lightguide
    U.S. Patent #4,950,059, August 21, 1990
    17.  
  17. Starting Electrodes for HID Lamps
    U.S. Patent #4,959,592, September 25, 1990 (with JM Anderson)
    18.  
  18. Discharge Lamp Using Acoustic Resonant Oscillations to Ensure High Efficiency
    U.S. Patent #4,983,889, January 8, 1991
    19.  
  19. Starting Aid for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent #5,047,693, September 10, 1991 (with SA El-Hamamsy)
    20.  
  20. Starting Aid for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent #5,084,654, January 28, 1992 (with SA El-Hamamsy)
    21.  
  21. Gas Probe Starter for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent #5,095,249, March 10, 1992 (with JT Dakin, ME Duffy & RA Heindl)
    22.  
  22. Feedback System for Stabilizing the Arc Discharge of a High Intensity Discharge Lamp
    U.S. Patent #5,134,345, July 28, 1992 (with SA El-Hamamsy)
    23.  
  23. Use of Silicon to Extend the Useful Life of Metal Halide Discharge Lamps
    U.S. Patent #5,136,214, August 4, 1992 (with DA Doughty & JL Myers)
    24.  
  24. Magnetically Tunable Starting Circuit for an Electrodeless High Intensity Discharge Lamp
    U.S. Patent #5,175,476, December 29, 1992 (with JM Anderson, GA Farrall, & JP Cocoma)
    25.  
  25. Method of Dosing a Discharge Lamp with Mercury
    U.S. Patent #5,213,537, May 25, 1993 (with JT Dakin, WR Champman & BF Fenoglio)
    26.  
  26. Combination Lamp and Integrating Sphere for Efficiently Coupling Radiant Energy from a Gas Discharge to a Lightguide
    U.S. Patent #Re. 34,492 (reissue of #4,950,059)
    27.  
  27. Electrostatic Shield to Reduce Wall Damage in an Electrodeless High Intensity Discharge Lamp
    U.S. Patent #5,438,235, August 1, 1995 (with TJ Sommerer, HR Chang, A Klein, HL Witting & GA Farrall)
    28.  
  28. Virtual Fixture for Reducing Electromagnetic Interaction Between an Electrodeless Lamp and a Metallic Fixture
    U.S. Patent #5,461,284, October 24,1995. (with El-Hamamsy, Taubert & Mieskoski)
    29.  
  29. Systematic Configuration of Compact Fluorescent Lamps for Operation in a Single-Type Ballast
    U.S. Patent #5,834,884, November 10, 1998 (with CJ Harsa, DJ Kachmarik and S Vamvakas)
    30.  
  30. Integrated Starting and Running Amalgam Assembly for an Electrodeless Fluorescent Lamp
    U.S. Patent #5,847,508, December 8, 1998. (with JC Borowiec and JP Cocoma)
    31.  
  31. Boil Dry Detection in Cooking Appliances
    U.S. Patent #6,469,282, October 22, 2002.

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Revised May 18, 2006