For the Inventor, By the Inventor

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Ann Arbor, MI, United States of America

Irwin Magnetic Systems, Inc.

USPTO Granted Patents = 14

Forward Citations = 340

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17 inventors (with patents filed for the assignee):

Michael L Bolt (4 out of 4 patents)

Francis Lum (4 out of 7 patents)

Edmund L Sokolik (3 out of 3 patents)

4. Marlin K Klumpp (2 out of 4 patents)

5. John M Chambors (2 out of 7 patents)

6. Samuel N Irwin (2 out of 7 patents)

7. Wayne E Stark (1 out of 34 patents)

8. Housan Dakroub (1 out of 36 patents)

9. Juan F Velazquez (1 out of 12 patents)

10. Michael I Behr (1 out of 6 patents)

11. Michael E Carlson (1 out of 1 patent)

12. Richard A Farkas (1 out of 1 patent)

13. Thomas J Angellotti (1 out of 1 patent)

14. Wolfgang Spiegelstein (1 out of 4 patents)

15. Joseph H Mueller (1 out of 2 patents)

14 patents: Sort by Forward Citations

1. 5055951 - Method and apparatus for servo-positioning movable transducer heads (1991-10-08),

2. 5050025 - Lead screw and follower-type head positioner for data recorders (1991-09-17),

3. 5003408 - Method and apparatus for removing data stream variations (1991-03-26),

4. 5001584 - Head-positioner arm for data recorders (1991-03-19),

5. 4954921 - Magnetic transducer head structure with reduced leakage between core (1990-09-04),

6. 4849841 - Transducer head core structure with recessed magnetic closures (1989-07-18),

7. 4819107 - Magnetic transducer head structure (1989-04-04),

8. 4807067 - Cartridge tape drive (1989-02-21),

9. 4796110 - System and method for encoding and storing digital information on (1989-01-03),

10. 4647994 - Miniaturized cartridge-type tape drive for data processors (1987-03-03),

11. 4646175 - Method and apparatus for positioning transducers by digital conversion (1987-02-24),

12. 4586094 - Method and apparatus for pre-recording tracking information on magnetic (1986-04-29),

13. 4498129 - Method and apparatus for normalizing servo-positioning signals (1985-02-05),

14. 4472750 - Data record with pre-recorded transducer positioning signals, and system (1984-09-18),

Irwin Magnetic Systems, Inc. is a leading manufacturer of magnetic separation equipment and industrial magnets. With over 60 years of experience, we specialize in providing high-quality magnetic solutions for a wide range of industries including mining, recycling, and food processing. Our innovative products help streamline operations and improve efficiency for our customers around the world.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 13 2026

14 Patents

#62 in Ann Arbor, MI

#773 in Michigan

#21,674 in US

#41,010 in the World

Ann Arbor, MI, United States of America

Irwin Magnetic Systems, Inc.

Forward Citations = 340

17 inventors:

Michael L Bolt (4 out of 4 patents)

Francis Lum (4 out of 7 patents)

Edmund L Sokolik (3 out of 3 patents)

4. Marlin K Klumpp (2 out of 4 patents)

5. John M Chambors (2 out of 7 patents)

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