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 = 310

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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. is a leading manufacturer of industrial air conditioning and refrigeration equipment. With a history dating back to 1933, Mcquay-perfex has built a reputation for high-quality products and reliable service. The company offers a wide range of products including chillers, air handling units, and packaged units for commercial and industrial applications. Mcquay-perfex is committed to innovation and sustainability, continuously improving their products to meet the evolving needs of their customers.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

14 Patents

#111 in Minneapolis, MN

#630 in Minnesota

#21,607 in US

#40,905 in the World

Minneapolis, MN, United States of America

Mcquay-perfex Inc.

Forward Citations = 310

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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