For the Inventor, By the Inventor

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Calgary, Canada

Pmc Pumps Inc.

USPTO Granted Patents = 2

EPO Patents = 1

Trademarks = 3

Forward Citations = 1

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5 inventors (with patents filed for the assignee):

John Hughes (1 out of 16 patents)

Yuchang (Bob) Ding (1 out of 1 patent)

Xuefeng (Kevin) Ding (1 out of 1 patent)

4. Yuchang Ding (1 out of 1 patent)

5. Gary Cheng (1 out of 1 patent)

6. Xuefeng Ding (0 patent)

2 patents: Sort by Forward Citations

1. 12492620 - Hydraulically actuated double-acting positive displacement pump system for producing fluids from a wellbore (2025-12-09),

2. 10544662 - Hydraulically actuated double-acting positive displacement pump system for producing fluids from a deviated wellbore (2020-01-28),

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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#392 in Calgary

#5,846 in Canada

Calgary, Canada

Pmc Pumps Inc.

Forward Citations = 1

5 inventors:

John Hughes (1 out of 16 patents)

Yuchang (Bob) Ding (1 out of 1 patent)

Xuefeng (Kevin) Ding (1 out of 1 patent)

4. Yuchang Ding (1 out of 1 patent)

5. Gary Cheng (1 out of 1 patent)

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