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For the Inventor, By the Inventor

Chicago, IL, United States of America

Advance Transformer Company

Calculating rank
USPTO Granted Patents = 19

Trademarks = 2

Forward Citations = 127

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14 inventors (with patents filed for the assignee):

goldMedal Joseph S Droho (4 out of 17 patents)

silverMedal Albert E Feinberg (4 out of 4 patents)

bronzeMedal 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:

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),
Company Overview
Advance Transformer Company, based in Chicago, IL, specializes in the design and manufacturing of electrical transformers and related equipment. The company focuses on providing innovative solutions for various applications, including industrial, commercial, and utility sectors. With a commitment to quality and efficiency, Advance Transformer leverages advanced technologies to enhance energy management and reliability in electrical systems. Their expertise extends to custom transformer solutions tailored to meet specific client needs.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

19 Patents

#219 in Chicago, IL

#876 in Illinois

#17,154 in US

#32,705 in the World

Chicago, IL (US)
Chicago, IL, United States of America

Advance Transformer Company

Forward Citations = 127

14 inventors:

goldMedal Joseph S Droho (4 out of 17 patents)

silverMedal Albert E Feinberg (4 out of 4 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Advance Transformer Company. Retrieved from https://idiyas.com/company/advance-transformer-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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