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For the Inventor, By the Inventor

Oak Creek, WI, United States of America

Master Lock Company LLC


USPTO Granted Patents = 453



Trademarks = 96

Forward Citations = 6,793

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215 inventors (with patents filed for the assignee):

goldMedal Scott B Stevens (78 out of 79 patents)

silverMedal Glenn P Meekma (36 out of 37 patents)

bronzeMedal Lea Marie Plato (34 out of 39 patents)

4.  Mark J Van Handel (33 out of 39 patents)

5.  Scott Kalous (32 out of 35 patents)

6.  Christopher Rohde (26 out of 108 patents)

7.  John Blomstrom (25 out of 25 patents)

8.  Zachery T Nave (24 out of 24 patents)

9.  John B Zapushek (23 out of 25 patents)

10.  D Scott Kalous (19 out of 28 patents)

11.  Gary R Burmesch (19 out of 19 patents)

12.  Jesse Alan Marcelle (19 out of 27 patents)

13.  John N Heppner (19 out of 19 patents)

14.  Dean D Hacker (16 out of 16 patents)

15.  Roy Alden Thompson (15 out of 21 patents)


Core Competencies:
Biometric Access
Smart Lock Technology
Electronic Lock Systems
Key Safe Solutions
Locking Device Innovations
Networked Security Systems
Wireless Firmware Updates
Access Credential Management
Safety Lockout Systems
Location Tracking
Camera Enabled Locking Devices
Multi-User Lockout Systems

453 patents:

1. 12481742 - Locking device biometric access (2025-11-25),
2. 12460447 - Video recording triggered by a smart lock device (2025-11-04),
3. D1098882 - Lock box (2025-10-21),
4. 12380749 - Electronic lock system (2025-08-05),
5. D1081328 - Key safe (2025-07-01),
6. 12281495 - Gearbox clutch mechanism for motorized lock (2025-04-21),
7. D1065978 - Lock box (2025-03-11),
8. 12238520 - Intelligent door lock system in communication with mobile device that stores associated user data (2025-02-25),
9. D1061215 - Door lock (2025-02-11),
10. 12212011 - Retrofit battery module (2025-01-28),
11. 12167293 - Systems and methods for dynamically delivering access credentials for locking systems (2024-12-10),
12. 12106618 - Isolation device (2024-10-01),
13. D1042091 - Lock (2024-09-17),
14. D1041291 - Lock (2024-09-10),
15. 12008850 - Guest access for locking device (2024-06-11),
Master Lock Company LLC is an American manufacturer of durable and reliable security products. With over 100 years of experience, they are renowned for their wide range of padlocks, combination locks, security cables, and other lock-based solutions. Master Lock provides innovative and trusted solutions for both residential and commercial customers, ensuring safety and peace of mind.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

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453 Patents

#1 in Oak Creek, WI

#20 in Wisconsin

#1,018 in US

#2,037 in the World

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Oak Creek, WI, United States of America

Master Lock Company LLC

Forward Citations = 6,793

215 inventors:

goldMedal Scott B Stevens (78 out of 79 patents)

silverMedal Glenn P Meekma (36 out of 37 patents)

bronzeMedal Lea Marie Plato (34 out of 39 patents)

4.  Mark J Van Handel (33 out of 39 patents)

5.  Scott Kalous (32 out of 35 patents)

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