For the Inventor, By the Inventor

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Worcester, MA, United States of America

Walker Magnetics Group, Inc.

USPTO Granted Patents = 15

Trademarks = 2

Forward Citations = 213

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13 inventors (with patents filed for the assignee):

Dominic F Pignataro (5 out of 6 patents)

Roger B Ela (3 out of 3 patents)

Vladimir W Osipov (2 out of 2 patents)

4. Pierre Doyelle (1 out of 6 patents)

5. Richard M Dunham (1 out of 2 patents)

6. Alan R Millner (1 out of 5 patents)

7. William H Benson (1 out of 4 patents)

8. Jean-Michel Gambut (1 out of 1 patent)

9. Thomas G Chadbourne (1 out of 1 patent)

10. Donald C McDonald (1 out of 3 patents)

11. Francis E Whittaker (1 out of 1 patent)

12. Paul H Guerin (1 out of 1 patent)

13. David W Palmer (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 6229422 - Electrically switchable magnet system (2001-05-08),

2. 6002317 - Electrically switchable magnet system (1999-12-14),

3. 5270678 - Magnetic rail chuck (1993-12-14),

4. 5134999 - Ultrasonic transducer assembly (1992-08-04),

5. 5080234 - Eddy current separator (1992-01-14),

6. 5014970 - Body member positioner (1991-05-14),

7. 4807430 - Thread wrapping apparatus (1989-02-28),

8. 4771358 - Magnetic chuck controller (1988-09-13),

9. 4733137 - Ion nitriding power supply (1988-03-22),

10. 4663602 - Magnetic chuck (1987-05-05),

11. 4633361 - Chuck control for a workpiece holding electromagnet (1986-12-30),

12. 4600964 - Lifting magnet system (1986-07-15),

13. 4044894 - Load tilting magnetic lift (1977-08-30),

14. 4023267 - Method of fabricating a magnetic chuck (1977-05-17),

15. 3978399 - Integrating fluxmeter with input current compensation to cancel drift (1976-08-31),

Walker Magnetics Group, Inc. is a leading manufacturer of magnetic solutions for various industries including automotive, metalworking, recycling, and more. With over 120 years of experience, the company offers a wide range of magnetic products such as lift magnets, magnetic sweepers, and separators to meet the needs of their customers. Walker Magnetics Group, Inc. is committed to providing innovative and reliable magnetic solutions to enhance efficiency and productivity for their clients.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

15 Patents

#20 in Worcester, MA

#1,230 in Massachusetts

#20,400 in US

#38,669 in the World

Worcester, MA, United States of America

Walker Magnetics Group, Inc.

Forward Citations = 213

13 inventors:

Dominic F Pignataro (5 out of 6 patents)

Roger B Ela (3 out of 3 patents)

Vladimir W Osipov (2 out of 2 patents)

4. Pierre Doyelle (1 out of 6 patents)

5. Richard M Dunham (1 out of 2 patents)

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