For the Inventor, By the Inventor

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Chicago, IL, United States of America

Advance Transformer Company

USPTO Granted Patents = 19

Trademarks = 2

Forward Citations = 127

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14 inventors (with patents filed for the assignee):

Joseph S Droho (4 out of 17 patents)

Albert E Feinberg (4 out of 4 patents)

Robert W Wisbey (4 out of 5 patents)

4. Joseph A Crawford (2 out of 4 patents)

5. Glenn D Rayno (2 out of 2 patents)

6. Stephen L Phelps (2 out of 3 patents)

7. George I Duncan (2 out of 2 patents)

8. Seymour Perkins, Iii (1 out of 5 patents)

9. Fernando A Joanino (1 out of 2 patents)

10. John M Wong (1 out of 12 patents)

11. Kenneth Woo (1 out of 1 patent)

12. Jacob Den Hollander (1 out of 1 patent)

13. Alexander R Hallay (1 out of 1 patent)

14. Herman Smulders (1 out of 2 patents)

19 patents: Sort by Forward Citations

1. 4939430 - Ignitor circuit for discharge lamps with novel ballast (1990-07-03),

2. 4876486 - Two-lead starter circuit for a gaseous discharge lamp (1989-10-24),

3. 4847535 - Hybrid ballast for multiple discharge lamps (1989-07-11),

4. 4791529 - Protected potted metallized film capacitor (1988-12-13),

5. 4740861 - Thermal protection device for a dual input voltage lamp (1988-04-26),

6. 4740731 - Two capacitor apparatus for sequential starting and operation of (1988-04-26),

7. 4729088 - Regulated high frequency power supply (1988-03-01),

8. 4714979 - Protected potted metallized film capacitor (1987-12-22),

9. 4695771 - Ignition circuit for high pressure arc discharge lamps (1987-09-22),

10. 4642521 - Compact igniter for discharge lamps (1987-02-10),

11. 4593231 - Three-way fluorescent lamp device (1986-06-03),

12. 4568860 - Rapid start fluorescent lamp circuits with disconnect sockets (1986-02-04),

13. 4565415 - Socket for fluorescent lamps (1986-01-21),

14. 4517498 - Sequence start lamp ballast with current spike suppression means (1985-05-14),

15. 4356431 - Magnetron energizing circuit (1982-10-26),

Advance Transformer Company is a leading manufacturer of high-quality, energy-efficient lighting products. With a wide range of products including ballasts, LED drivers, and transformers, Advance Transformer Company offers solutions for a variety of lighting applications. They are committed to innovation and sustainability, providing reliable products that are both environmentally friendly and cost-effective.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

19 Patents

#198 in Chicago, IL

#844 in Illinois

#16,635 in US

#31,731 in the World

Chicago, IL, United States of America

Advance Transformer Company

Forward Citations = 127

14 inventors:

Joseph S Droho (4 out of 17 patents)

Albert E Feinberg (4 out of 4 patents)

Robert W Wisbey (4 out of 5 patents)

4. Joseph A Crawford (2 out of 4 patents)

5. Glenn D Rayno (2 out of 2 patents)

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