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For the Inventor, By the Inventor

Indianapolis, IN, United States of America

Von Duprin, Inc.

Calculating rank
USPTO Granted Patents = 74


Trademarks = 8

Forward Citations = 1,222

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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 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:

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),
Company Overview
Von Duprin, Inc., based in Indianapolis, IN, specializes in the development and manufacturing of exit devices and related security solutions. The company is recognized for its innovative technologies in exit device systems, including panic exit devices, electromagnetic locks, and door lock assemblies. With a focus on enhancing safety and accessibility, Von Duprin's products are integral to commercial and institutional environments, ensuring compliance with safety regulations while providing reliable access control solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

74 Patents

#22 in Indianapolis, IN

#89 in Indiana

#4,986 in US

#10,140 in the World

Indianapolis, IN (US)
Indianapolis, IN, United States of America

Von Duprin, Inc.

Forward Citations = 1,222

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 26 patents)

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

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

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Von Duprin, Inc.. Retrieved from https://idiyas.com/company/von-duprin

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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