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Carlsbad, CA, United States of America

Gemological Institute of America, Inc. (Gia)

USPTO Granted Patents = 50

Forward Citations = 174

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35 inventors (with patents filed for the assignee):

Hiroshi Takahashi (16 out of 18 patents)

Troy Blodgett (14 out of 18 patents)

Marc Verboven (13 out of 14 patents)

4. Wuyi Wang (11 out of 13 patents)

5. Tsung-Han Tsai (8 out of 8 patents)

6. Dirk Nuyts (8 out of 8 patents)

7. Matt Hall (4 out of 6 patents)

8. George Wyatt Rhodes (3 out of 13 patents)

9. Christopher M Breeding (3 out of 3 patents)

10. Lorne Loudin (2 out of 2 patents)

11. Mehdi Toosi (2 out of 2 patents)

12. Shane Elen (2 out of 4 patents)

13. Ren Lu (2 out of 3 patents)

14. Ronald Hendrik Geurts (2 out of 8 patents)

15. David Nelson (2 out of 2 patents)

Core Competencies:

Gemstone Evaluation

Fluorescence Imaging

Clarity Grading

Spectroscopy Techniques

Optical Quality Assessment

Gem Identification

Digital Image Verification

Photoluminescence Analysis

Gemstone Screening

High-Resolution Imaging

Gemstone Cut Grading

Fingerprinting Techniques

50 patents: Sort by Forward Citations

1. 12399131 - Detection and grading of the effect of blue fluorescence on diamond appearances (2025-08-26),

2. 12385846 - Digital image gemstone verification with filters (2025-08-12),

3. 12380085 - Method and system for providing a clarity grade for a gem (2025-08-05),

4. 12372467 - Apparatus and method for fluorescence grading of gemstones (2025-07-29),

5. 12135278 - Light emitting diode arrangements for gemstone evaluation (2024-11-05),

6. 12085511 - Imaging assisted scanning spectroscopy for gem identification (2024-09-10),

7. 12025563 - Fluorescence imaging of gemstone on transparent stage (2024-07-02),

8. 11988610 - Detection and grading of the effect of blue fluorescence on diamond appearances (2024-05-21),

9. 11921051 - Apparatus and method for assessing optical quality of gemstones (2024-03-05),

10. 11915407 - Automated system and method for clarity measurements and clarity grading (2024-02-27),

11. 11892405 - Apparatus and method for fluorescence grading of gemstones (2024-02-06),

12. 11879842 - Luminescence imaging for gemstone screening (2024-01-23),

13. 11828703 - Ultraviolet-visible absorption spectroscopy for gemstone identification (2023-11-28),

14. 11815465 - Portable high-resolution gem imaging system (2023-11-14),

15. 11789919 - Method and system for providing a clarity grade for a gem (2023-10-17),

Established in 1931, Gemological Institute of America, Inc. (GIA) is a renowned nonprofit organization dedicated to ensuring the integrity and understanding of gemstones and jewelry. As the world's foremost authority on diamonds, colored stones, and pearls, GIA sets the standards for gemstone identification and grading. Through education, research, and laboratory services, GIA strives to empower the global gem and jewelry industry, as well as consumers, with expertise and accurate information on gemstones and their value.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

50 Patents

#34 in Carlsbad, CA

#1,609 in California

#6,771 in US

#13,599 in the World

Carlsbad, CA, United States of America

Gemological Institute of America, Inc. (Gia)

Forward Citations = 174

35 inventors:

Hiroshi Takahashi (16 out of 18 patents)

Troy Blodgett (14 out of 18 patents)

Marc Verboven (13 out of 14 patents)

4. Wuyi Wang (11 out of 13 patents)

5. Tsung-Han Tsai (8 out of 8 patents)

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