For the Inventor, By the Inventor

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Salem, OR, United States of America

Supra Products, Inc.

USPTO Granted Patents = 30

Trademarks = 2

Forward Citations = 1,911

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28 inventors (with patents filed for the assignee):

Wayne F Larson (20 out of 40 patents)

Walter G Henderson (11 out of 13 patents)

John W Sherman (6 out of 7 patents)

4. Gerald R Daum (5 out of 5 patents)

5. George A Ellson (5 out of 6 patents)

6. Philip D Barrett (4 out of 5 patents)

7. John Q Archer, Ii (4 out of 4 patents)

8. John E Gray (4 out of 4 patents)

9. Rockne M Olds (4 out of 4 patents)

10. Jerry P Scansen (4 out of 4 patents)

11. Edgar J Unrein (4 out of 4 patents)

12. Matthew S Hill (3 out of 24 patents)

13. John M Kniffin (2 out of 3 patents)

14. John J Risko (2 out of 2 patents)

15. Martin A Barrett (2 out of 2 patents)

30 patents: Sort by Forward Citations

1. D399408 - Key box (1998-10-13),

2. 5794465 - Key lock box assembly (1998-08-18),

3. 5768921 - Key box device (1998-06-23),

4. 5705991 - Access control device featuring key ordering or key simultaneity (1998-01-06),

5. 5654696 - Method for transferring auxillary data using components of a secure (1997-08-05),

6. 5602536 - Data synchronization method for use with portable, microprocessor-based (1997-02-11),

7. 5550529 - Access control system (1996-08-27),

8. 5475375 - Electronic access control systems (1995-12-12),

9. 5280518 - Electronic security system (1994-01-18),

10. 5267460 - Combination lock (1993-12-07),

11. 5245652 - Secure entry system with acoustically coupled telephone interface (1993-09-14),

12. 5090222 - Electronic lock box and retention mechanism for use therein (1992-02-25),

13. 5046084 - Electronic real estate lockbox system with improved reporting capability (1991-09-03),

14. 4988987 - Keysafe system with timer/calendar features (1991-01-29),

15. 4947163 - Electronic security system with configurable key (1990-08-07),

Supra Products, Inc. is a company that specializes in manufacturing innovative consumer electronics. With over 20 years of experience, we are highly recognized for our cutting-edge technology and high-quality products. Our extensive product range includes smartphones, smart TVs, home appliances, wearables, and many more. We are committed to delivering exceptional value and unmatched customer satisfaction. Visit our website to explore our latest product offerings and experience the future of technology.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

30 Patents

#1 in Salem, OR

#117 in Oregon

#10,859 in US

#21,180 in the World

Salem, OR, United States of America

Supra Products, Inc.

Forward Citations = 1,911

28 inventors:

Wayne F Larson (20 out of 40 patents)

Walter G Henderson (11 out of 13 patents)

John W Sherman (6 out of 7 patents)

4. Gerald R Daum (5 out of 5 patents)

5. George A Ellson (5 out of 6 patents)

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