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West Allis, WI, United States of America

Kearney & Trecker Corporation

USPTO Granted Patents = 89

Forward Citations = 1,720

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51 inventors (with patents filed for the assignee):

Richard Johnstone (19 out of 19 patents)

Edward E Kirkham (14 out of 20 patents)

Frank Zankl (13 out of 13 patents)

4. Ervin J Kielma (11 out of 11 patents)

5. Richard E Stobbe (9 out of 10 patents)

6. Earl R Lohneis (7 out of 7 patents)

7. John J Schachte (6 out of 6 patents)

8. Lyle D Ostby (5 out of 7 patents)

9. Russell B Clegg (4 out of 4 patents)

10. Charles B Sipek (4 out of 4 patents)

11. Richard W Caddell (4 out of 4 patents)

12. Albin J Schabowski (3 out of 3 patents)

13. Michael R Cesarz (3 out of 3 patents)

14. Frank E Dailey (3 out of 3 patents)

15. John T Currer (3 out of 3 patents)

Core Competencies:

Six Axis Machine Tool

Automated Tool Changer

Tool Clamping Mechanism

Flexible Manufacturing System

Servo-Controlled Spindle Drive

High Speed Toolholder

Numerically Controlled

Workpiece Storage

Machine Tool Lubrication

Digital Data Communication

Multiple Spindle Toolhead

Adaptive Control System

89 patents: Sort by Forward Citations

1. 5354158 - Six axis machine tool (1994-10-11),

2. 5283934 - Automated part storage and machnining system (1994-02-08),

3. 5066176 - Probe for machine tool (1991-11-19),

4. 4988244 - Six-axis machine tool (1991-01-29),

5. 4845834 - Tool clamping mechanism (1989-07-11),

6. 4792267 - Carriage for a machine tool (1988-12-20),

7. 4784894 - Molded polymer composite (1988-11-15),

8. 4759115 - Numerically controlled automatic tool changing machining center having a (1988-07-26),

9. 4750272 - Tool measuring device employing gap width detection (1988-06-14),

10. 4699276 - Chain-type tool storage magazine (1987-10-13),

11. 4679970 - High speed toolholder for a machining center (1987-07-14),

12. 4673076 - Rotary shuttle for machine tools (1987-06-16),

13. 4643037 - Gear change mechanism (1987-02-17),

14. 4632612 - Spindle orientation apparatus (1986-12-30),

15. 4629053 - Closed loop machining system (1986-12-16),

Company Overview

Kearney & Trecker Corporation, based in West Allis, Wisconsin, specializes in advanced machine tool technology. The company is known for its innovative solutions in six-axis machine tools, automated tool changers, and flexible manufacturing systems. Their expertise extends to servo-controlled spindle drives and high-speed toolholders, which enhance precision and efficiency in manufacturing processes. Kearney & Trecker is committed to advancing the capabilities of numerically controlled systems and workpiece storage solutions, serving a diverse range of industries.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

89 Patents

#1 in West Allis, WI

#95 in Wisconsin

#4,195 in US

#8,613 in the World

West Allis, WI, United States of America

Kearney & Trecker Corporation

Forward Citations = 1,720

51 inventors:

Richard Johnstone (19 out of 19 patents)

Edward E Kirkham (14 out of 20 patents)

Frank Zankl (13 out of 13 patents)

4. Ervin J Kielma (11 out of 11 patents)

5. Richard E Stobbe (9 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kearney & Trecker Corporation. Retrieved from https://idiyas.com/company/kearney-and-trecker

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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