For the Inventor, By the Inventor

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Raleigh, NC, United States of America

Powerware Corporation

USPTO Granted Patents = 39

% Expired Patents = 20.5

Trademarks = 1

Forward Citations = 1,999

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50 inventors (with patents filed for the assignee):

Robert William Johnson, Jr (9 out of 50 patents)

Cary Frank Winch (7 out of 8 patents)

Craig Edevold (7 out of 9 patents)

4. William J Raddi (6 out of 11 patents)

5. Joseph Charles Paulakonis (5 out of 12 patents)

6. Joseph R Wade (5 out of 5 patents)

7. Donald K Zahrte, Sr (5 out of 10 patents)

8. Frederick Tassitino, Jr (3 out of 13 patents)

9. Peter William Jungwirth (3 out of 8 patents)

10. Edward Akbari (3 out of 3 patents)

11. David L Layden (3 out of 9 patents)

12. George William Oughton, Jr (2 out of 22 patents)

13. Derek Laufenberg (2 out of 2 patents)

14. Pasi Sakari Taimela (2 out of 16 patents)

15. Miguel Eduardo Chavez (2 out of 4 patents)

Core Competencies:

Battery Management

Power Factor Correction

Uninterruptible Power Supply

Power Conversion

Charger Control

Heat Sink Apparatus

Dynamic Feedback Control

Voltage Regulators

Transformer Circuits

Modular Systems

Multi-Input Power Transfer

Hysteretic Current Control

39 patents: Sort by Forward Citations

1. 7132833 - System for detecting defective battery packs (2006-11-07),

2. 7129822 - Devices for detecting the presence of a source of power (2006-10-31),

3. 6906933 - Power supply apparatus and methods with power-factor correcting bypass mode (2005-06-14),

4. 6819576 - Power conversion apparatus and methods using balancer circuits (2004-11-16),

5. 6753622 - Uninterruptible power supply systems and methods using rectified AC with current control (2004-06-22),

6. 6724596 - Hysteretic current control method and an uninterruptible power supply using same (2004-04-20),

7. 6661678 - Power factor corrected UPS with improved connection of battery to neutral and methods of operation thereof (2003-12-09),

8. 6629247 - Methods, systems, and computer program products for communications in uninterruptible power supply systems using controller area networks (2003-09-30),

9. 6605879 - Battery charger control circuit and an uninterruptible power supply utilizing same (2003-08-12),

10. 6599657 - Battery pack housing and battery pack and power supply device incorporating the same (2003-07-29),

11. 6549440 - AC power supply apparatus and methods providing output control based on estimated instantaneous reactive power (2003-04-15),

12. 6535100 - Insulated transformer foil windings with breakouts and methods for forming the same (2003-03-18),

13. 6515883 - Single-stage power converter and an uninterruptible power supply using same (2003-02-04),

14. 6486399 - Pole mount cabinet and method for assembling the same (2002-11-26),

15. 6483730 - Power converters with AC and DC operating modes and methods of operation thereof (2002-11-19),

Powerware Corporation, based in Raleigh, NC, specializes in advanced power management solutions, focusing on uninterruptible power supplies (UPS) and power distribution systems. The company is dedicated to enhancing energy efficiency and reliability across various sectors, including data centers, telecommunications, and industrial applications. With a commitment to innovation, Powerware develops technologies that ensure continuous power availability and optimize energy usage, catering to the evolving needs of its global clientele.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

Powerware Corporation

39 Patents

#19 in Raleigh, NC

#203 in North Carolina

#8,810 in US

#17,413 in the World

Raleigh, NC, United States of America

Powerware Corporation

Forward Citations = 1,999

50 inventors:

Robert William Johnson, Jr (9 out of 50 patents)

Cary Frank Winch (7 out of 8 patents)

Craig Edevold (7 out of 9 patents)

4. William J Raddi (6 out of 11 patents)

5. Joseph Charles Paulakonis (5 out of 12 patents)

Please report any incorrect information to [email protected]

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