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Hopkins, MN, United States of America

Electro-Craft Corporation

USPTO Granted Patents = 11

Trademarks = 14

Forward Citations = 289

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11 inventors (with patents filed for the assignee):

Robert H Schmidt (2 out of 12 patents)

Erland K Persson (2 out of 2 patents)

Ronald W Fryer (2 out of 2 patents)

4. Jess Guerra (2 out of 2 patents)

5. David T Phillips (1 out of 5 patents)

6. Dennis R Hipkins (1 out of 1 patent)

7. Marvin L Schiedermayer (1 out of 2 patents)

8. Kazuo Mogi (1 out of 1 patent)

9. Muneo Suita (1 out of 1 patent)

10. Saeid M Razavi (1 out of 1 patent)

11. Saeid Meshkat-Razavi (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 4651068 - Brushless motor control circuitry with optimum current vector control (1987-03-17),

2. 4498037 - Velocity servo controller (1985-02-05),

3. 4426606 - Emergency stop device for brushless motors (1984-01-17),

4. 4417141 - Optical shaft angle encoder (1983-11-22),

5. 4322646 - Flux focussed DC motor and method for assembly (1982-03-30),

6. 4285595 - Modular encoder (1981-08-25),

7. 4208621 - Brushless DC motor control system (1980-06-17),

8. 4184071 - Modular encoder (1980-01-15),

9. 4088943 - Brushless DC tachometer circuit (1978-05-09),

10. 4086519 - Hall effect shaft angle position encoder (1978-04-25),

11. 3989992 - Pulse width modulated control system (1976-11-02),

Electro-Craft Corporation, based in Hopkins, MN, specializes in the design and manufacture of precision motion control solutions. The company focuses on developing advanced motor and drive systems tailored for a variety of applications, including industrial automation, robotics, and medical devices. With a commitment to innovation, Electro-Craft integrates cutting-edge technology to enhance performance and reliability in its products, serving a diverse range of industries across North America and beyond.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

11 Patents

#5 in Hopkins, MN

#786 in Minnesota

#27,490 in US

#51,714 in the World

Hopkins, MN, United States of America

Electro-Craft Corporation

Forward Citations = 289

11 inventors:

Robert H Schmidt (2 out of 12 patents)

Erland K Persson (2 out of 2 patents)

Ronald W Fryer (2 out of 2 patents)

4. Jess Guerra (2 out of 2 patents)

5. David T Phillips (1 out of 5 patents)

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