For the Inventor, By the Inventor

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Indianapolis, IN, United States of America

Von Duprin, Inc.

USPTO Granted Patents = 74

EPO Patents = 1

Trademarks = 8

Forward Citations = 1,219

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59 inventors (with patents filed for the assignee):

Gerald E Mader (13 out of 16 patents)

William P Dye (12 out of 17 patents)

Michael D Coleman (10 out of 26 patents)

4. Paul J Haeck (8 out of 18 patents)

5. Richard B Cohrs (8 out of 10 patents)

6. Daniel N Nigro, Jr (7 out of 7 patents)

7. Matthew S Prucinsky (6 out of 6 patents)

8. Marlin D Austin (6 out of 15 patents)

9. John R Foster (4 out of 22 patents)

10. Theodore Joseph Fritsch (4 out of 8 patents)

11. Roger A Vitt (4 out of 4 patents)

12. Michael L Cain (4 out of 4 patents)

13. Paul J Hoggard (4 out of 4 patents)

14. David V Toloday (3 out of 19 patents)

15. Gary R Jacobs (3 out of 74 patents)

Core Competencies:

Exit Device

Door Lock Assembly

Electromagnetic Lock

Panic Exit Device

Latching Mechanism

Push Pad

Door Holder

Modular Assembly

Breakaway Lever

Electric Strike

Latchbolt

Alarm Lock

74 patents: Sort by Forward Citations

1. 9181739 - Adjustable door mounting system (2015-11-10),

2. 9097046 - Hinge with articulating cover system (2015-08-04),

3. 8480136 - Exit device and method of operating the same (2013-07-09),

4. 8182003 - Exit device and method of operating the same (2012-05-22),

5. 8146961 - Exit device (2012-04-03),

6. 7832777 - Door lock assembly (2010-11-16),

7. 7722096 - Latchbolt for a door lock assembly (2010-05-25),

8. 7616090 - Electronic security system (2009-11-10),

9. 7249477 - Control for exit device (2007-07-31),

10. D542626 - Exit device centercase cover (2007-05-15),

11. D541633 - Exit device centercase cover (2007-05-01),

12. 6595563 - Electric strike field-selectable fail-safe/fail-secure mechanism (2003-07-22),

13. 6485066 - Exit alarm lock deadbolt having guide supports (2002-11-26),

14. 6409232 - Exit alarm lock assembly with push pad pivotally interconnected to deadbolt (2002-06-25),

15. 6304177 - Switching assembly for an exit alarm lock (2001-10-16),

Von Duprin, Inc. is a leading manufacturer of door hardware solutions for commercial and institutional settings. With over 100 years of expertise, Von Duprin provides a wide range of innovative products including panic exit devices, electric strikes, and access control systems. Their high-quality and reliable solutions have become synonymous with safety, security, and convenience in the industry.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

74 Patents

#22 in Indianapolis, IN

#89 in Indiana

#4,972 in US

#10,119 in the World

Indianapolis, IN, United States of America

Von Duprin, Inc.

Forward Citations = 1,219

59 inventors:

Gerald E Mader (13 out of 16 patents)

William P Dye (12 out of 17 patents)

Michael D Coleman (10 out of 26 patents)

4. Paul J Haeck (8 out of 18 patents)

5. Richard B Cohrs (8 out of 10 patents)

Please report any incorrect information to [email protected]

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