Forward Citations = 102

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8 inventors (with patents filed for the assignee):

Carl J Howard (3 out of 4 patents)

William S Stone (3 out of 3 patents)

Donald J Wrobel (2 out of 4 patents)

4. Charles Piotrowski (2 out of 2 patents)

5. Merle Felker (2 out of 2 patents)

6. Carlson A Waite (2 out of 2 patents)

7. Thomas M Dittrich (2 out of 2 patents)

8. Jay D Beery (1 out of 1 patent)

13 patents: Sort by Forward Citations

1. 5143687 - Rapid change wedge chuck with positive lock (1992-09-01),

2. 5105523 - Method and means assuring repeatable concentricity (1992-04-21),

3. 5052700 - Compensating and/or centralizing grip chuck (1991-10-01),

4. 4688810 - Support for a chuck (1987-08-25),

5. 4662043 - Project plate system (1987-05-05),

6. 4647051 - Support for a chuck (1987-03-03),

7. 4591171 - Seal for air charging a chuck (1986-05-27),

8. 4422655 - Chuck with improved jaw actuator support structure (1983-12-27),

9. 4422653 - Chuck for tubular workpieces (1983-12-27),

10. 4355816 - Double acting internal diameter gripping chucks (1982-10-26),

11. 4236722 - Double acting cam operated chuck collet (1980-12-02),

12. 4206932 - Diaphragm chuck with locking ring (1980-06-10),

13. 4094521 - Collet chuck (1978-06-13),

Company Overview

Sheffer Collet Company, based in Traverse City, MI, specializes in the design and manufacture of precision collet systems and related tooling solutions. The company focuses on providing innovative products that enhance the efficiency and accuracy of machining processes across various industries. With a commitment to quality and performance, Sheffer Collet serves a diverse clientele, ensuring that its advanced technologies meet the evolving needs of manufacturing and engineering sectors.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

13 Patents

#3 in Traverse City, MI

#850 in Michigan

#23,854 in US

#45,081 in the World

Traverse City, MI, United States of America

Sheffer Collet Company

Forward Citations = 102

8 inventors:

Carl J Howard (3 out of 4 patents)

William S Stone (3 out of 3 patents)

Donald J Wrobel (2 out of 4 patents)

4. Charles Piotrowski (2 out of 2 patents)

5. Merle Felker (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sheffer Collet Company. Retrieved from https://idiyas.com/company/sheffer-collet-company

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]