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For the Inventor, By the Inventor

Nicholasville, KY, United States of America

Sargent & Greenleaf, Inc.


USPTO Granted Patents = 62

% Expired Patents = 3.2



Trademarks = 7

Forward Citations = 962

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53 inventors (with patents filed for the assignee):

goldMedal Walter R Evans (11 out of 11 patents)

silverMedal Michael Robert Clark (10 out of 10 patents)

bronzeMedal James C Miller (6 out of 6 patents)

4.  Harry C Miller (6 out of 12 patents)

5.  Gregory C Lainhart (5 out of 5 patents)

6.  Charles G Bechtiger (5 out of 5 patents)

7.  Joseph M Remenicky (4 out of 4 patents)

8.  Paul R Proefrock (4 out of 4 patents)

9.  Gary R Murphree (4 out of 4 patents)

10.  George Marshall Horne (3 out of 5 patents)

11.  James P Peppard (3 out of 3 patents)

12.  Klaus W Gartner (2 out of 61 patents)

13.  Roy T Abner (2 out of 3 patents)

14.  Ned R Urschel (2 out of 2 patents)

15.  Steven Lee Worm (2 out of 47 patents)


Core Competencies:
Electronic Combination Lock
High Security Lock
Time Lock
Manipulation Resistant
Padlock
Shock Resistant
Key Cylinder
Safe Deposit Lock
Combination Lock
Monitoring System
Tumbler Wheel
Override Mechanism

62 patents:

1. 10669744 - Mechanical override of an electronic lock (2020-06-02),
2. 10415270 - High security electrochemical lock (2019-09-17),
3. 10134208 - System and method of initializing and controlling locks (2018-11-20),
4. 10032328 - Non-intrusive dial rotation detection of high security locks (2018-07-24),
5. 9964284 - Light for keypad bezel (2018-05-08),
6. 9845618 - Shock resistant lock (2017-12-19),
7. 8496167 - Cash tracking system (2013-07-30),
8. 6510587 - Door closure prevention apparatus and method (2003-01-28),
9. 6212923 - Lock including means for sensing position of bolt and for indicating whether or not bolt is extended from lock case (2001-04-10),
10. 6196037 - Lock system enabling user to lock door and extend lock bolt in a single action and push-pull lock with cushioning arrangement for protecting bolt drive components (2001-03-06),
11. 6094952 - Dead bolt combination lock with integrated re-locking features (2000-08-01),
12. 6016677 - Dead bolt combination lock and push-pull lock, each with integrated (2000-01-25),
13. 5816084 - Electronic combination lock with an arrangement for moving a locking (1998-10-06),
14. 5749252 - Manipulation resistant combination lock and method (1998-05-12),
15. 5647235 - Tamper-evident electronic combination lock having integral (1997-07-15),
Company Overview
Sargent & Greenleaf, Inc. is a leading manufacturer specializing in electronic locks, with a strong focus on high-security solutions. Based in Nicholasville, Kentucky, the company develops advanced technologies such as electronic combination locks, manipulation-resistant designs, and time locks. Their product range includes padlocks, shock-resistant locks, key cylinders, and safe deposit locks, catering to various security needs across multiple sectors. Sargent & Greenleaf is recognized for its commitment to innovation and reliability in the security industry.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

Sargent & Greenleaf, Inc. USPTO Patent Assignee Logo
62 Patents

#1 in Nicholasville, KY

#24 in Kentucky

#5,842 in US

#11,761 in the World

Nicholasville, KY (US)
Nicholasville, KY, United States of America

Sargent & Greenleaf, Inc.

Forward Citations = 962

53 inventors:

goldMedal Walter R Evans (11 out of 11 patents)

silverMedal Michael Robert Clark (10 out of 10 patents)

bronzeMedal James C Miller (6 out of 6 patents)

4.  Harry C Miller (6 out of 12 patents)

5.  Gregory C Lainhart (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sargent & Greenleaf, Inc.. Retrieved from https://idiyas.com/company/sargent-and-greenleaf

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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