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For the Inventor, By the Inventor

Ancaster, Canada

Stackpole International Engineered Products, Ltd.


USPTO Granted Patents = 14

% Expired Patents = 21.4



Forward Citations = 21

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16 inventors (with patents filed for the assignee):

goldMedal Ralph Valkenberg (5 out of 5 patents)

silverMedal Hans Peter Kutzer (4 out of 5 patents)

bronzeMedal Liping Wang (3 out of 7 patents)

4.  Richard Muizelaar (3 out of 18 patents)

5.  Andrzej Kowalski (2 out of 4 patents)

6.  Paul Morton (2 out of 2 patents)

7.  Manfred Arnold (2 out of 4 patents)

8.  Vladimir Vukas (1 out of 1 patent)

9.  Luke Bouwmeester (1 out of 1 patent)

10.  Oliver Böwing (1 out of 1 patent)

11.  Tuncay Bayo (1 out of 1 patent)

12.  Abdalhameed Zubeidat (1 out of 1 patent)

13.  Haytham Elgamal (1 out of 1 patent)

14.  Matthew Tyler Hughes (1 out of 1 patent)

15.  Theresa Kam Lun Chan (1 out of 1 patent)


14 patents:

1. 11796555 - Pump assembly having a controller including a circuit board and 3D rotary sensor for detecting rotation of its pump (2023-10-24),
2. 11493036 - Spool valve used in a variable vane pump (2022-11-08),
3. 11480173 - Pressure relief valve integrated in pivot pin of pump (2022-10-25),
4. 11421685 - Vane pump with improved seal assembly for control chamber (2022-08-23),
5. 11035360 - Gerotor with spindle (2021-06-15),
6. 10871161 - Epitrochoidal vacuum pump (2020-12-22),
7. 10815991 - Dual input pump and system (2020-10-27),
8. 10808697 - Pump assembly having integrated controller and motor with internal active cooling (2020-10-20),
9. 10253772 - Pump with control system including a control system for directing delivery of pressurized lubricant (2019-04-09),
10. 10247187 - Variable displacement vane pump with thermo-compensation (2019-04-02),
11. 10030656 - Variable displacement vane pump with integrated fail safe function (2018-07-24),
12. 9771935 - Variable displacement vane pump with thermo-compensation (2017-09-26),
13. 9534519 - Variable displacement vane pump with integrated fail safe function (2017-01-03),
14. 9109597 - Variable displacement pump with multiple pressure chambers where a circumferential extent of a first portion of a first chamber is greater than a second portion (2015-08-18),
Company Overview
Stackpole International Engineered Products, Ltd. is a leading manufacturer specializing in advanced engineered products for the automotive sector. The company focuses on developing innovative solutions that enhance vehicle performance and efficiency, particularly in the areas of fluid management and powertrain technologies. With a commitment to research and development, Stackpole leverages cutting-edge engineering practices to deliver high-quality components that meet the evolving needs of the global automotive market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

14 Patents

#1 in Ancaster

#1,066 in Canada

#42,199 in the World

Ancaster, CA
Ancaster, Canada

Stackpole International Engineered Products, Ltd.

Forward Citations = 21

16 inventors:

goldMedal Ralph Valkenberg (5 out of 5 patents)

silverMedal Hans Peter Kutzer (4 out of 5 patents)

bronzeMedal Liping Wang (3 out of 7 patents)

4.  Richard Muizelaar (3 out of 18 patents)

5.  Andrzej Kowalski (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Stackpole International Engineered Products, Ltd.. Retrieved from https://idiyas.com/company/stackpole-international-engineered-products

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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