Forward Citations = 102

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3 inventors (with patents filed for the assignee):

David E Hall (2 out of 63 patents)

Stephen H Mayer (2 out of 2 patents)

Louis M Crain (2 out of 2 patents)

4 patents: Sort by Forward Citations

1. 5224176 - Automated coin grading system (1993-06-29),

2. 5220614 - Automated coin grading system (1993-06-15),

3. 5109977 - Tamperproof coin case (1992-05-05),

4. 5042650 - Tamperproof coin case (1991-08-27),

Professional Coin Grading Service (PCGS) is a leading third-party coin authentication and grading company. They offer expert, unbiased opinions on coins' authenticity and condition, providing collectors and investors with confidence and security in their numismatic pursuits. With a team of experienced and knowledgeable experts, PCGS has become a trusted and respected name in the coin industry, setting the standard for coin grading and certification.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

4 Patents

#112 in Santa Ana, CA

#13,663 in California

#58,999 in US

Santa Ana, CA, United States of America

Professional Coin Grading Service, Inc.

Forward Citations = 102

3 inventors:

David E Hall (2 out of 63 patents)

Stephen H Mayer (2 out of 2 patents)

Louis M Crain (2 out of 2 patents)

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