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Chicago, IL, United States of America

Stewart Warner Corporation

USPTO Granted Patents = 92

Trademarks = 1

Forward Citations = 1,369

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62 inventors (with patents filed for the assignee):

William R Mayer (11 out of 12 patents)

Frank J Fontana (7 out of 8 patents)

Howard J Rasmussen (7 out of 9 patents)

4. Jerry D Shew (6 out of 6 patents)

5. Francis E Ferrari (5 out of 5 patents)

6. Frans Brouwer (5 out of 15 patents)

7. Gregory E Slobodzian (5 out of 5 patents)

8. Renzo N Rutili (4 out of 5 patents)

9. Robert A Payne (4 out of 4 patents)

10. John D Baker (4 out of 4 patents)

11. Ronald J Hickman (4 out of 4 patents)

12. Alton E Runions (4 out of 4 patents)

13. Frank C Weaver (3 out of 5 patents)

14. Mark C Kao (3 out of 4 patents)

15. Vernon N Tramontini (3 out of 3 patents)

Core Competencies:

Pressure Sender

Pneumatic Motors

Lubrication Assembly

Air Core Gauge

Tachometer Kit

Illuminated Display

Dual Wheel Caster

Grease Gun

Speed Sensor

Pattern Tracer

Cruise Control Switch

Timing Meter

92 patents: Sort by Forward Citations

1. 4947150 - Pressure sender (1990-08-07),

2. 4941136 - Programmable hour meter for recording elapsed operation time (1990-07-10),

3. 4908806 - Directional spring for AC synchronous motor (1990-03-13),

4. 4870891 - Pneumatically controlled air motor (1989-10-03),

5. 4807090 - Instrument illumination system (1989-02-21),

6. 4793022 - Tread protector for dual wheel caster (1988-12-27),

7. 4768300 - Illuminated information display (1988-09-06),

8. 4758784 - Air core gauge with zero pointer return related application (1988-07-19),

9. 4756230 - Sound attenuator for pneumatic motors (1988-07-12),

10. D296300 - Dual wheel caster (1988-06-21),

11. D295599 - Dual mode grease gun (1988-05-10),

12. 4732361 - High pressure lubricant control valve with self-cleaning restrictor (1988-03-22),

13. 4732221 - Pneumatic chipping hammer and method of manufacture (1988-03-22),

14. 4732034 - Tachometer kit with alternator pick up (1988-03-22),

15. 4728039 - Paint spray gun nozzle assembly (1988-03-01),

Company Overview

Stewart Warner Corporation, based in Chicago, IL, specializes in the development and manufacturing of pneumatic control systems. The company is recognized for its innovative solutions in pressure sensing, pneumatic motors, and lubrication assemblies, catering to various industrial applications. Their product lineup includes air core gauges, tachometer kits, illuminated displays, dual wheel casters, and grease guns, reflecting a commitment to quality and performance in the engineering sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

92 Patents

#68 in Chicago, IL

#230 in Illinois

#4,073 in US

#8,367 in the World

Chicago, IL, United States of America

Stewart Warner Corporation

Forward Citations = 1,369

62 inventors:

William R Mayer (11 out of 12 patents)

Frank J Fontana (7 out of 8 patents)

Howard J Rasmussen (7 out of 9 patents)

4. Jerry D Shew (6 out of 6 patents)

5. Francis E Ferrari (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Stewart Warner Corporation. Retrieved from https://idiyas.com/company/stewart-warner

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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