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For the Inventor, By the Inventor

Pittsburgh, PA, United States of America

Union Switch & Signal, Inc.


USPTO Granted Patents = 87

% Expired Patents = 5.7


Trademarks = 7

Forward Citations = 1,352

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78 inventors (with patents filed for the assignee):

goldMedal Raymond C Franke (12 out of 15 patents)

silverMedal Ronald R Capan (8 out of 8 patents)

bronzeMedal James P Chew (8 out of 14 patents)

4.  Kevin M McQuistian (7 out of 7 patents)

5.  Leonard M Wydotis (6 out of 12 patents)

6.  Daniel H Brushwood (6 out of 6 patents)

7.  Theo C Giras (6 out of 6 patents)

8.  Robert P Bozio (5 out of 5 patents)

9.  Joseph A Profeta (5 out of 5 patents)

10.  Richard S Jones (4 out of 8 patents)

11.  Michael E Colbaugh (4 out of 4 patents)

12.  Anthony G Ehrlich (3 out of 3 patents)

13.  James P Brown (3 out of 3 patents)

14.  Barry W Johnson (2 out of 30 patents)

15.  Robert Dennis Pascoe (2 out of 5 patents)


Core Competencies:
Railway Signal
Traffic Planning
Vehicle Detection
Switch Control
Point Detector
Cab Signaling
Railway Circuit
Dynamic Monitoring
Safety Systems
Communication Systems
Pneumatic Valve
Hazard Prediction

87 patents:

1. 7464904 - Method and system providing sleep and wake-up modes for railway track circuit unit (2008-12-16),
2. 7437605 - Hot standby method and apparatus (2008-10-14),
3. 7395140 - Geographic information system and method for monitoring dynamic train positions (2008-07-01),
4. 7386391 - Dynamic optimizing traffic planning method and system (2008-06-10),
5. 7296770 - Electronic vital relay (2007-11-20),
6. 7199883 - System and method for sensing position of a vehicle (2007-04-03),
7. 7168662 - Hollow tie railroad switching assembly (2007-01-30),
8. 6688559 - Modular point detector for railroad track switch (2004-02-10),
9. 6663052 - Modular point detector for railroad track signal (2003-12-16),
10. 6648276 - Drop down lug for railroad switch application (2003-11-18),
11. 6585194 - Modular point detector for railroad track switch (2003-07-01),
12. 6578799 - Modular point detector for railroad track signal (2003-06-17),
13. 6494409 - Railway code following apparatus (2002-12-17),
14. 6484974 - Controller for switch machine (2002-11-26),
15. 6474605 - Point detector sleeve for railroad switch machine and associated method (2002-11-05),
Company Overview
Union Switch & Signal, Inc. is a leading provider of advanced railway signal systems, specializing in enhancing the safety and efficiency of rail transportation. Based in Pittsburgh, PA, the company focuses on critical technologies such as traffic planning, vehicle detection, and switch control. Their innovative solutions include cab signaling and dynamic monitoring systems, which are essential for modern railway operations. Union Switch & Signal is committed to delivering reliable and effective signaling solutions that meet the evolving needs of the railway industry.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

87 Patents

#40 in Pittsburgh, PA

#166 in Pennsylvania

#4,286 in US

#8,776 in the World

Pittsburgh, PA (US)
Pittsburgh, PA, United States of America

Union Switch & Signal, Inc.

Forward Citations = 1,352

78 inventors:

goldMedal Raymond C Franke (12 out of 15 patents)

silverMedal Ronald R Capan (8 out of 8 patents)

bronzeMedal James P Chew (8 out of 14 patents)

4.  Kevin M McQuistian (7 out of 7 patents)

5.  Leonard M Wydotis (6 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Union Switch & Signal, Inc.. Retrieved from https://idiyas.com/company/union-switch-and-signal

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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