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 = 1,927

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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 28 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)

Core Competencies:

Key Box

Access Control

Electronic Lock

Data Synchronization

Combination Lock

Electronic Security

Keysafe System

Pushbutton Lock

Secure Entry

Real Estate Lockbox

Peripheral Key

Tumbler Lock

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 based in Salem, Oregon, specializing in the design and manufacturing of innovative products for various industries. The organization focuses on developing advanced solutions that enhance efficiency and performance across its product lines. With a commitment to quality and innovation, Supra Products engages in research and development to create cutting-edge technologies that meet the evolving needs of its clients, contributing to advancements in their respective fields.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

30 Patents

#2 in Salem, OR

#118 in Oregon

#11,249 in US

#21,840 in the World

Salem, OR, United States of America

Supra Products, Inc.

Forward Citations = 1,927

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)

Please report any incorrect information to [email protected]

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