For the Inventor, By the Inventor

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Milwaukee, WI, United States of America

Deltrol Corp.

USPTO Granted Patents = 15

EPO Patents = 1

Trademarks = 5

Forward Citations = 137

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12 inventors (with patents filed for the assignee):

John L Harris (5 out of 11 patents)

Verne P Donner (3 out of 3 patents)

Brian T Cahill (1 out of 18 patents)

4. Nick William Buettner (1 out of 8 patents)

5. James Ostrenga (1 out of 1 patent)

6. John Schlais (1 out of 1 patent)

7. Joseph J Mahon (1 out of 15 patents)

8. George F Jambor (1 out of 10 patents)

9. Richard S Stone (1 out of 1 patent)

10. Roger D Rulseh (1 out of 3 patents)

11. Anthony V Guigliano (1 out of 1 patent)

12. James E Green, Jr (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 11640864 - System and method for detecting position of a solenoid plunger (2023-05-02),

2. 11618666 - Contactless liquid dispensing valve (2023-04-04),

3. 5300908 - High speed solenoid (1994-04-05),

4. 4751487 - Double acting permanent magnet latching solenoid (1988-06-14),

5. 4340203 - Three way slide valve with center return (1982-07-20),

6. 4203014 - Adjustable interval cycle timer (1980-05-13),

7. 4091839 - Ball check valve (1978-05-30),

8. 4041424 - Automatic reset timer (1977-08-09),

9. 4022109 - Automatic directional control valve (1977-05-10),

10. 3992960 - Two speed manual preset timer (1976-11-23),

11. 3968698 - Automatic reset timer (1976-07-13),

12. 3965312 - Percentage timer (1976-06-22),

13. 3950624 - Automatic reset timer with latch controlled cam operator (1976-04-13),

14. 3947790 - Automatic reset timer (1976-03-30),

15. 3939870 - Combination manual and pilot operated directional control valve (1976-02-24),

Deltrol Corp. is a leading manufacturer of electromechanical and electronic products designed for a variety of applications, including fluid control systems, industrial equipment, and vehicle components. With over 50 years of experience, Deltrol is committed to providing high-quality, reliable solutions to meet the needs of its customers.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

15 Patents

#81 in Milwaukee, WI

#478 in Wisconsin

#20,436 in US

#38,730 in the World

Milwaukee, WI, United States of America

Deltrol Corp.

Forward Citations = 137

12 inventors:

John L Harris (5 out of 11 patents)

Verne P Donner (3 out of 3 patents)

Brian T Cahill (1 out of 18 patents)

4. Nick William Buettner (1 out of 8 patents)

5. James Ostrenga (1 out of 1 patent)

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