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For the Inventor, By the Inventor

Indianapolis, IN, United States of America

Von Duprin, Inc.


USPTO Granted Patents = 74


Trademarks = 8

Forward Citations = 1,172

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59 inventors (with patents filed for the assignee):

goldMedal Gerald E Mader (13 out of 16 patents)

silverMedal William P Dye (12 out of 17 patents)

bronzeMedal Michael D Coleman (10 out of 24 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 21 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 17 patents)

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


Core Competencies:
Adjustable Door Mounting
Hinge Mechanisms
Exit Devices
Electronic Security Systems
Door Lock Assemblies
Push Pad Mechanisms
Electromagnetic Door Holders
Breakaway Lever Mechanisms
Fire Rated Mullions
Deadbolt Assemblies
Latchbolt Designs
Pneumatic Exit Controls

74 patents:

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.

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USPTO Data Jan 1 1976 - Dec 16 2025

74 Patents

#23 in Indianapolis, IN

#91 in Indiana

#4,758 in US

#9,718 in the World

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Indianapolis, IN, United States of America

Von Duprin, Inc.

Forward Citations = 1,172

59 inventors:

goldMedal Gerald E Mader (13 out of 16 patents)

silverMedal William P Dye (12 out of 17 patents)

bronzeMedal Michael D Coleman (10 out of 24 patents)

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

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

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