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Tokyo Kogaku Kikai Kabushiki Kaisha

USPTO Granted Patents = 153

Trademarks = 1

Forward Citations = 2,260

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144 inventors (with patents filed for the assignee):

Fumio Ohtomo (16 out of 250 patents)

Kazuo Nunokawa (15 out of 18 patents)

Yasuo Kato (11 out of 24 patents)

4. Kazutoshi Takagi (11 out of 19 patents)

5. Hisakazu Yoshino (11 out of 20 patents)

6. Shinichi Nishimura (10 out of 35 patents)

7. Susumu Takahashi (9 out of 129 patents)

8. Takashi Yokokura (8 out of 21 patents)

9. Ikuo Kitao (8 out of 14 patents)

10. Taketoshi Ishihara (8 out of 9 patents)

11. Shinji Wada (7 out of 24 patents)

12. Yoshinori Oana (7 out of 8 patents)

13. Yasufumi Fukuma (6 out of 115 patents)

14. Nobuaki Kitajima (6 out of 29 patents)

15. Yukinori Karasawa (6 out of 6 patents)

Core Competencies:

Ophthalmic Lenses

Noncontact Tonometer

Binocular Microscope

Optical Distance Measurement

Eye Testing Apparatus

Laser Beam Scanning

Retinal Camera

Corneal Configuration Measurement

Automatic Eye Refractive Power Measurement

Illuminating Systems

Gaze-Fixing Devices

Holographic Interferometers

153 patents: Sort by Forward Citations

1. 5777716 - Progressive power presbyopia-correcting ophthalmic lenses (1998-07-07),

2. 5165408 - Gas jet shooting device for use with a non-contact tonometer (1992-11-24),

3. 5092334 - Noncontact type tonometer (1992-03-03),

4. 5015081 - Binocular microscope (1991-05-14),

5. 5002388 - Optical distance measuring apparatus having a measurement error (1991-03-26),

6. 4996990 - Air-puff tonometer (1991-03-05),

7. 4984890 - Method and an apparatus for aligning first and second objects with each (1991-01-15),

8. 4947849 - Non-contact type tonometer (1990-08-14),

9. 4941744 - Integrated-photocircuit interferometer (1990-07-17),

10. 4934812 - Light detector (1990-06-19),

11. 4932774 - Illuminating system of ophthalmological instrument (1990-06-12),

12. 4916297 - Code reader (1990-04-10),

13. 4902133 - Method and an apparatus for aligning first and second objects with each (1990-02-20),

14. 4872460 - Noncontact type tonometer (1989-10-10),

15. 4859051 - Eye testing apparatus (1989-08-22),

Tokyo Kogaku Kikai Kabushiki Kaisha is a Japanese company specializing in the production of optical and precision equipment. Established in 1946, the company has a long-standing reputation for delivering high-quality products in the fields of microscopy, cameras, lenses, and other optical instruments. With their commitment to technological innovation and customer satisfaction, Tokyo Kogaku Kikai Kabushiki Kaisha continues to be a trusted and leading manufacturer in the industry.

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

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USPTO Data Jan 1 1976 - Dec 30 2025

153 Patents

#25 in

#817 in Japan

#5,201 in the World

Tokyo Kogaku Kikai Kabushiki Kaisha

Forward Citations = 2,260

144 inventors:

Fumio Ohtomo (16 out of 250 patents)

Kazuo Nunokawa (15 out of 18 patents)

Yasuo Kato (11 out of 24 patents)

4. Kazutoshi Takagi (11 out of 19 patents)

5. Hisakazu Yoshino (11 out of 20 patents)

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