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Kabushiki Kaisha Topcon

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USPTO Granted Patents = 1,033

% Expired Patents = 20.4

EPO Patents = 287

Trademarks = 18

Forward Citations = 11,210

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538 inventors (with patents filed for the assignee):

Fumio Ohtomo (178 out of 250 patents)

Kaoru Kumagai (96 out of 152 patents)

Yasufumi Fukuma (79 out of 122 patents)

4. Hitoshi Otani (53 out of 75 patents)

5. Jun-ichi Kodaira (45 out of 51 patents)

6. Kunihiro Hayashi (44 out of 45 patents)

7. Kazuki Osaragi (42 out of 47 patents)

8. Mitsuo Ishii (42 out of 67 patents)

9. Toshifumi Mihashi (40 out of 47 patents)

10. Masahiro Ohishi (34 out of 41 patents)

11. Hisashi Tsukada (33 out of 50 patents)

12. Masayuki Momiuchi (30 out of 33 patents)

13. Masahiro Akiba (30 out of 38 patents)

14. Tsutomu Kikawa (27 out of 31 patents)

15. Takefumi Hayashi (25 out of 31 patents)

Core Competencies:

OCT Angiography

Blood Flow Measurement

Ophthalmic Microscope

Optical Coherence Tomography

Fundus Imaging

Optic Disc Segmentation

Patient Management System

Laser Treatment Apparatus

Three-Dimensional Measurement

Geographic Atrophy Detection

Electro-Optical Distance Meter

Visual Function Testing

1,033 patents: Sort by Forward Citations

1. 11678796 - Blood flow measurement apparatus (2023-06-20),

2. 11481897 - OCT angiography calculation with optimized signal processing (2022-10-25),

3. 10980416 - Blood flow measurement apparatus (2021-04-20),

4. 10932665 - Ophthalmologic microscope system (2021-03-02),

5. 10905323 - Blood flow measurement apparatus (2021-02-02),

6. 10820803 - Patient management system and patient management server (2020-11-03),

7. 10788310 - Methods and apparatus for phase stabilized swept-source optical coherence tomography (SS-OCT) including rescaling and dynamic range enhancement (2020-09-29),

8. 10758123 - Ophthalmological microscope system (2020-09-01),

9. 10719933 - OCT angiography calculation with optimized signal processing (2020-07-21),

10. 10705225 - Preparation system for surveying operation (2020-07-07),

11. 10690497 - Surveying instrument including a reflective prism mounted on a movable part (2020-06-23),

12. 10670493 - Safety diagnosis system for structure (2020-06-02),

13. 10627212 - Swept-source optical coherence tomography (SS-OCT) phase stabilization with reference signal calibration (2020-04-21),

14. 10602129 - Image acquiring device and image acquiring system (2020-03-24),

15. 10548472 - Ophthalmic examination support system, ophthalmic examination support server and ophthalmic examination support device (2020-02-04),

Company Overview

Kabushiki Kaisha Topcon, headquartered in Tokyo, specializes in advanced ophthalmologic imaging technologies. The company focuses on developing innovative solutions such as Optical Coherence Tomography (OCT), OCT Angiography, and sophisticated ophthalmic microscopes. Their expertise extends to blood flow measurement and fundus imaging, enhancing diagnostic capabilities in eye care. Topcon also offers patient management systems and laser treatment apparatus, contributing significantly to the field of ophthalmology and improving patient outcomes globally.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

1,033 Patents

#114 in Tokyo

#225 in Japan

#990 in the World

Kabushiki Kaisha Topcon

Forward Citations = 11,210

538 inventors:

Fumio Ohtomo (178 out of 250 patents)

Kaoru Kumagai (96 out of 152 patents)

Yasufumi Fukuma (79 out of 122 patents)

4. Hitoshi Otani (53 out of 75 patents)

5. Jun-ichi Kodaira (45 out of 51 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kabushiki Kaisha Topcon. Retrieved from https://idiyas.com/company/kabushiki-kaisha-topcon

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]

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