For the Inventor, By the Inventor

Enter assignee name

West Hartford, CT, United States of America

Dunham-Bush

USPTO Granted Patents = 47

Trademarks = 4

Forward Citations = 1,117

Loading Chart...

Loading Chart...

28 inventors (with patents filed for the assignee):

David N Shaw (28 out of 51 patents)

Donald D Schaefer (6 out of 6 patents)

Joseph A Gagnon (4 out of 4 patents)

4. Steven W Paul (2 out of 2 patents)

5. Clifford T Bulkley (2 out of 2 patents)

6. Sebastian J Gianni (2 out of 2 patents)

7. David J First (1 out of 3 patents)

8. Robert A Ingalls (1 out of 7 patents)

9. Joseph S Orosz (1 out of 1 patent)

10. Anthony J Bianco (1 out of 1 patent)

11. Daryl K Showalter (1 out of 1 patent)

12. Warren H Dillenbeck (1 out of 1 patent)

13. James W Oliver, Jr (1 out of 1 patent)

14. Leonard H Schwarz (1 out of 1 patent)

15. Eugene E O'Neil (1 out of 1 patent)

Core Competencies:

Heat Exchanger

Screw Compressor

Flow Deflector

Variable Volume Pump

Capacity Control

Refrigeration System

Lubrication System

Solar Augmented Heat Pump

Thermal Solar

Evaporator Pressure

Compressor Control

Mist Lubrication

47 patents: Sort by Forward Citations

1. 5423378 - Heat exchanger element and heat exchanger using same (1995-06-13),

2. 4909716 - Screw step drive internal volume ratio varying system for helical screw (1990-03-20),

3. 4727907 - Turbulator with integral flow deflector tabs (1988-03-01),

4. 4647801 - Electric motor back-stopping device (1987-03-03),

5. 4585169 - Constant volume flow burner fuel control system (1986-04-29),

6. 4583373 - Constant evaporator pressure slide valve modulator for screw compressor (1986-04-22),

7. 4545742 - Vertical axis hermetic helical screw rotary compressor with discharge (1985-10-08),

8. 4536130 - Simplified unloader indicator for helical screw rotary compressor (1985-08-20),

9. 4527967 - Screw rotor machine with specific tooth profile (1985-07-09),

10. 4508491 - Modular unload slide valve control assembly for a helical screw rotary (1985-04-02),

11. 4497185 - Oil atomizing compressor working fluid cooling system for (1985-02-05),

12. 4495778 - Temperature and pressure actuated capacity control system for air (1985-01-29),

13. 4478054 - Helical screw rotary compressor for air conditioning system having (1984-10-23),

14. 4477233 - Vertical axis hermetic helical screw rotary compressor with discharge (1984-10-16),

15. 4439121 - Self-cleaning single loop mist type lubrication system for screw (1984-03-27),

Company Overview

Dunham-Bush is a prominent manufacturer specializing in advanced thermal management solutions, primarily focusing on heat exchangers and compressor systems. The company is recognized for its innovative technologies, including helical screw rotary compressors, variable volume pumps, and integrated thermal solar heat pumps. Based in West Hartford, CT, Dunham-Bush serves various industries by providing efficient temperature control systems and oil equalization systems, contributing to energy savings and sustainability in heating and cooling applications.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

47 Patents

#5 in West Hartford, CT

#195 in Connecticut

#7,437 in US

#14,821 in the World

West Hartford, CT, United States of America

Dunham-Bush

Forward Citations = 1,117

28 inventors:

David N Shaw (28 out of 51 patents)

Donald D Schaefer (6 out of 6 patents)

Joseph A Gagnon (4 out of 4 patents)

4. Steven W Paul (2 out of 2 patents)

5. Clifford T Bulkley (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dunham-Bush. Retrieved from https://idiyas.com/company/dunham-bush

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]

Loading…