Seiji Nakahata

This inventor holds 94 USPTO granted patents and 12 published patent applications, plus 1 CIPO patent and 13 EPO patents, primarily in Nitride Semiconductor Technology (CPC class H01L29-2003). Top assignees: Sumitomo Electric Industries, Limited, Other. Active years: 1994-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiji Nakahata. Retrieved from https://idiyas.com/inventor/seiji-nakahata

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 94 (Patent Applications = 12)

% Patents Active = 64.9

CIPO Patents = 1 (Patent Applications = 1)

EPO Patents = 13 (Patent Applications = 12)

Average Co-Inventor Count = 3.5

ph-index = 13

Forward Citations = 891(Granted Patents)

Forward Citations (Not Self Cited) = 812(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Hyogo, JP (1994 - 2018)
Itami, JP (1995 - 2021)

Company Filing History:

94 out of 10,641

Sumitomo Electric Industries, Limited

patents

2 out of 834,513

Other

patents

where one patent can have more than one assignee

Years Active: 1994-2021

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Areas of Expertise:

Nitride Semiconductor

GaN Substrate

Composite Substrate

Epitaxial Layer

Single-Crystal Ingot

Manufacturing Method

III-Nitride Crystal

Semiconductor Device

Freestanding Substrate

Light Emitting Device

Crystal Growth

III-V Compound Crystal

94 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11094537 - Group III nitride composite substrate and method for manufacturing the same, and method for manufacturing group III nitride semiconductor device (2021-08-17),

2. 10837124 - Gallium nitride substrate (2020-11-17),

3. 10600676 - Group III nitride composite substrate and method for manufacturing the same, and method for manufacturing group III nitride semiconductor device (2020-03-24),

4. 10458043 - Gallium nitride substrate (2019-10-29),

5. 10443151 - Gallium nitride substrate (2019-10-15),

6. 10078059 - Nitride crystal, nitride crystal substrate, epilayer-containing nitride crystal substrate, semiconductor device and method of manufacturing the same (2018-09-18),

7. 10006147 - Gallium nitride substrate (2018-06-26),

8. 9917004 - Group III nitride composite substrate and method for manufacturing the same, and method for manufacturing group III nitride semiconductor device (2018-03-13),

9. 9570540 - Nitride crystal, nitride crystal substrate, epilayer-containing nitride crystal substrate, semiconductor device and method of manufacturing the same (2017-02-14),

10. 9368568 - Group III nitride crystal substrates and group III nitride crystal (2016-06-14),

11. 9252207 - Composite substrate (2016-02-02),

12. 9136337 - Group III nitride composite substrate and method for manufacturing the same, laminated group III nitride composite substrate, and group III nitride semiconductor device and method for manufacturing the same (2015-09-15),

13. 9064706 - Composite of III-nitride crystal on laterally stacked substrates (2015-06-23),

14. 8872309 - Composite of III-nitride crystal on laterally stacked substrates (2014-10-28),

15. 8847363 - Method for producing group III nitride crystal (2014-09-30),

Title: The Innovative Journey of Seiji Nakahata

Introduction: Seiji Nakahata, a pioneering inventor hailing from Itami, Japan, has made significant contributions to the world of technology and innovation through his groundbreaking inventions.

Latest Patents: Seiji Nakahata holds several patents in the field of robotics and artificial intelligence, with his most recent patent focusing on a revolutionary method for enhancing human-robot interactions through advanced sensor technology.

Career Highlights: With a career spanning over two decades, Seiji Nakahata has worked tirelessly to push the boundaries of technological advancement. His innovative spirit and dedication have led to the development of cutting-edge solutions that have transformed industries.

Collaborations: Throughout his career, Seiji Nakahata has collaborated with leading research institutions and tech companies to further his research and bring his inventions to life. His collaborative efforts have resulted in the creation of groundbreaking technologies that have had a lasting impact on society.

Conclusion: Seiji Nakahata's passion for innovation and his relentless pursuit of excellence have solidified his position as a trailblazer in the world of technology. His inventions continue to inspire future generations of inventors and shape the landscape of innovation for years to come.

Profile summary based on public USPTO records.