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 = 1

Forward Citations = 217

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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 provider of magnetic solutions, specializing in the design and manufacture of magnetic lifting and holding equipment. The company serves a diverse range of industries, including manufacturing, construction, and logistics, offering innovative products that enhance operational efficiency and safety. With a strong focus on engineering and technology, Walker Magnetics is committed to delivering high-quality solutions tailored to meet the specific needs of its clients across various sectors.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

15 Patents

#21 in Worcester, MA

#1,273 in Massachusetts

#21,034 in US

#39,881 in the World

Worcester, MA, United States of America

Walker Magnetics Group, Inc.

Forward Citations = 217

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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