For the Inventor, By the Inventor

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Minneapolis, MN, United States of America

Mcquay-Perfex Inc.

USPTO Granted Patents = 14

Forward Citations = 314

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16 inventors (with patents filed for the assignee):

Kenneth E Vogel (4 out of 4 patents)

Charles G Erickson (2 out of 3 patents)

Richard T Cornelius (2 out of 3 patents)

4. Jerome D Powlas (2 out of 2 patents)

5. James R Johannsen (2 out of 2 patents)

6. Thomas E Watson (1 out of 8 patents)

7. Gene W Osheroff (1 out of 4 patents)

8. Laurence McGann (1 out of 1 patent)

9. Dean R Peterson (1 out of 1 patent)

10. Gene T Neudeck (1 out of 1 patent)

11. Richard T Cornelius, Deceased (1 out of 2 patents)

12. Paul R Smallwood, Jr (1 out of 2 patents)

13. Richard G Lareau, Executor (1 out of 1 patent)

14. Randy L Buth (1 out of 1 patent)

15. Robert A Essig (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 4429782 - Screw conveyer with removable flighting (1984-02-07),

2. 4392417 - Variable dead band pressure control system (1983-07-12),

3. 4363596 - Method and apparatus for surge detection and control in centrifugal gas (1982-12-14),

4. 4356703 - Refrigeration defrost control (1982-11-02),

5. 4334648 - Airflow limiter and measurement device (1982-06-15),

6. 4257318 - Variable dead band pressure control system (1981-03-24),

7. 4248335 - Key-operated actuator (1981-02-03),

8. 4236577 - Separately removable tubes in heavy duty heat exchanger assemblies (1980-12-02),

9. 4193781 - Head pressure control for heat reclaim refrigeration systems (1980-03-18),

10. 4171069 - Beverage dispenser (1979-10-16),

11. 4136528 - Refrigeration system subcooling control (1979-01-30),

12. 4124994 - Beverage cooling bath (1978-11-14),

13. 4091637 - Electric defrost heater for fin and tube refrigeration heat exchanger (1978-05-30),

14. 4037622 - Diaphragm reversing valve (1977-07-26),

Mcquay-Perfex Inc., based in Minneapolis, MN, specializes in the development and manufacturing of advanced HVAC systems and solutions. The company focuses on energy-efficient heating, ventilation, and air conditioning technologies, catering to both commercial and industrial markets. With a commitment to innovation, Mcquay-Perfex integrates cutting-edge engineering practices to enhance indoor air quality and optimize energy consumption, positioning itself as a leader in the HVAC industry.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#121 in Minneapolis, MN

#645 in Minnesota

#22,302 in US

#42,199 in the World

Minneapolis, MN, United States of America

Mcquay-Perfex Inc.

Forward Citations = 314

16 inventors:

Kenneth E Vogel (4 out of 4 patents)

Charles G Erickson (2 out of 3 patents)

Richard T Cornelius (2 out of 3 patents)

4. Jerome D Powlas (2 out of 2 patents)

5. James R Johannsen (2 out of 2 patents)

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