For the Inventor, By the Inventor

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Bagley, MN, United States of America

Product Research and Development, Inc.

USPTO Granted Patents = 21

Forward Citations = 542

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9 inventors (with patents filed for the assignee):

E Dale Hartley (10 out of 23 patents)

Donald F Solomon (6 out of 16 patents)

F Scott Hartley (6 out of 13 patents)

4. Layne S Leishman (3 out of 4 patents)

5. Brian George Eck (1 out of 28 patents)

6. Shane Clair Okeson (1 out of 11 patents)

7. Michael Gunderson (1 out of 3 patents)

8. Richard K Olson (1 out of 1 patent)

9. John E Zerbey (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 6120399 - Continuously variable transmission driven element (2000-09-19),

2. 5380428 - Pump for reverse osmosis system (1995-01-10),

3. 5244361 - Pump for reverse osmosis system (1993-09-14),

4. 5193988 - Reverse osmosis system and automatic cycling booster pump therefor (1993-03-16),

5. 5154820 - Reverse osmosis system with cycled pressure intensifiers (1992-10-13),

6. 5125809 - Wobble plate pump (1992-06-30),

7. D323999 - Highway delineator guidepost (1992-02-18),

8. 5028166 - Highway guidepost (1991-07-02),

9. 5020605 - Post driver and methodology (1991-06-04),

10. 5000845 - Reverse osmosis system and automatic cycling booster pump therefor (1991-03-19),

11. 4995793 - Reverse osmosis system and automatic cycling booster pump therefor (1991-02-26),

12. 4827832 - Valve system for a reciprocating device (1989-05-09),

13. 4827831 - Reciprocating device and switching mechanism therefor (1989-05-09),

14. 4797069 - Pump with variable angle wobble plate (1989-01-10),

15. 4684332 - Ratio pump and method (1987-08-04),

Product Research and Development, Inc. is a specialized firm based in Bagley, Minnesota, focusing on innovative solutions in product design and development. The company excels in creating advanced prototypes and conducting extensive research to enhance product functionality and marketability. With a strong emphasis on collaboration, it partners with various industries to deliver tailored solutions that meet specific client needs. Their expertise spans multiple domains, ensuring a comprehensive approach to product innovation and development.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

21 Patents

#2 in Bagley, MN

#469 in Minnesota

#15,668 in US

#29,893 in the World

Bagley, MN, United States of America

Product Research and Development, Inc.

Forward Citations = 542

9 inventors:

E Dale Hartley (10 out of 23 patents)

Donald F Solomon (6 out of 16 patents)

F Scott Hartley (6 out of 13 patents)

4. Layne S Leishman (3 out of 4 patents)

5. Brian George Eck (1 out of 28 patents)

Please report any incorrect information to [email protected]

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