Forward Citations = 98

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10 inventors (with patents filed for the assignee):

Dimiter S Zagoroff (5 out of 23 patents)

Charles M Zepp (3 out of 57 patents)

Kenneth S Norland (3 out of 11 patents)

4. Louis Locatell (3 out of 3 patents)

5. F Donald Roberts (2 out of 11 patents)

6. Roger L Johnsen (2 out of 4 patents)

7. Louis M Scarmoutzos (1 out of 8 patents)

8. George R Bird (1 out of 6 patents)

9. Dimiter S Zagaroff (1 out of 1 patent)

10. Robert G Graham, Jr (1 out of 1 patent)

11 patents: Sort by Forward Citations

1. 6427502 - Truck tailgate locking device (2002-08-06),

2. 6209366 - Truck tailgate locking device (2001-04-03),

3. 5422382 - Substituted xanthene compounds (1995-06-06),

4. 5379617 - Automobile anti-theft device (1995-01-10),

5. 5326502 - Pyridylbenzimidazole compositions for absorbing ultraviolet light (1994-07-05),

6. 5303971 - Tailgate release handle security device (1994-04-19),

7. 5211885 - Squarylium dyes and products and processes using same (1993-05-18),

8. 5197315 - Automobile anti-theft device (1993-03-30),

9. 5149830 - Substituted xanthene compounds (1992-09-22),

10. 5104171 - Tailgate guard assembly (1992-04-14),

11. 4611439 - Portable bleacher (1986-09-16),

Company Overview

Steadfast Corporation, based in Chelsea, MA, specializes in the development and manufacturing of advanced materials and innovative solutions for various industries. The company focuses on enhancing product performance through cutting-edge research in material science and engineering. With a commitment to quality and sustainability, Steadfast serves a diverse clientele, providing tailored solutions that meet the evolving needs of sectors such as construction, automotive, and consumer goods.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

11 Patents

#4 in Chelsea, MA

#1,661 in Massachusetts

#27,529 in US

#51,801 in the World

Chelsea, MA, United States of America

Steadfast Corporation

Forward Citations = 98

10 inventors:

Dimiter S Zagoroff (5 out of 23 patents)

Charles M Zepp (3 out of 57 patents)

Kenneth S Norland (3 out of 11 patents)

4. Louis Locatell (3 out of 3 patents)

5. F Donald Roberts (2 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Steadfast Corporation. Retrieved from https://idiyas.com/company/steadfast

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]