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Yokohama, Japan

Tomokazu Katsuyama

This inventor holds 15 USPTO granted patents. Top assignee: Sumitomo Electric Industries, Limited. Active years: 2004-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tomokazu Katsuyama. Retrieved from https://idiyas.com/inventor/tomokazu-katsuyama

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

USPTO Granted Patents = 15

% Patents Active = 66.7

Average Co-Inventor Count = 1.2

ph-index = 2

Forward Citations = 16(Granted Patents)

Location History:

Kanagawa, JP (2007)
Yokohama, JP (2004 - 2016)
Osaka, JP (2021)

Company Filing History:

15 out of 10,647

Sumitomo Electric Industries, Limited

Years Active: 2004-2021

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11126021 - Semiconductor optical device and method for manufacturing the same (2021-09-21),

2. 9341772 - Integrated semiconductor device (2016-05-17),

3. 9235002 - Integrated semiconductor device (2016-01-12),

4. 8741670 - Method for producing integrated optical device (2014-06-03),

5. 8637338 - Method for producing integrated optical device (2014-01-28),

6. 8637337 - Method for producing integrated optical device (2014-01-28),

7. 8227275 - Method to form semiconductor laser diode with mesa structure buried by current blocking layer (2012-07-24),

8. 8021985 - Method to form semiconductor laser diode (2011-09-20),

9. 7998770 - Method for forming a semiconductor light-emitting device (2011-08-16),

10. 7816157 - Method of producing semiconductor optical device (2010-10-19),

11. 7723138 - Method of fabricating a semiconductor optical device (2010-05-25),

12. 7678594 - Integrated optical device and fabrication method thereof (2010-03-16),

13. 7627009 - Light-emitting device on n-type InP substrate heavily doped with sulfur (2009-12-01),

14. 7196909 - AC coupling circuit having a large capacitance and a good frequency response (2007-03-27),

15. 6791159 - Optical module (2004-09-14),

Profile summary based on public USPTO records.

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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