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Asahi Kasei Microsystems Co., Ltd.

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USPTO Granted Patents = 46

% Expired Patents = 21.7

Trademarks = 2

Forward Citations = 295

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57 inventors (with patents filed for the assignee):

Koji Tomioka (4 out of 4 patents)

Kenji Nemoto (4 out of 4 patents)

Yoshiaki Konno (3 out of 3 patents)

4. Nagamasa Shiokawa (3 out of 3 patents)

5. Tamotsu Nagashima (2 out of 3 patents)

6. Isao Kimura (2 out of 54 patents)

7. Mark E Collins (2 out of 4 patents)

8. Takeshi Fujita (2 out of 2 patents)

9. Hideaki Hirose (2 out of 2 patents)

10. Ken Yamamura (2 out of 2 patents)

11. Sumner B Marshall, Iii (2 out of 2 patents)

12. Tatsuya Yamauchi (2 out of 2 patents)

13. Yoshihiro Okusa (2 out of 2 patents)

14. Daniel Wu (2 out of 5 patents)

15. Shiro Suzuki (2 out of 2 patents)

Core Competencies:

Waveform Generating Circuit

Power Converter

Semiconductor Laser

Frequency-Controlled Oscillator

Digital Switching Amplifier

Temperature Compensation

D/A Converter

Optical Disc Device

Hall Device

Feedback Control Circuit

Analog Arithmetic Circuit

Communication Device

46 patents: Sort by Forward Citations

1. 7786768 - Waveform generating circuit and spread spectrum clock generator (2010-08-31),

2. 7705921 - Digital BTSC multi-channel TV sound decoder circuit, and decoder comprising same (2010-04-27),

3. 7560909 - Power converter using extrapolative conductance mode control (2009-07-14),

4. 7529173 - Optical disc device, circuit for optical disc device, wobble signal reproduction method, and land pre-pit signal reproduction method (2009-05-05),

5. 7372881 - Semiconductor laser wavelength control device (2008-05-13),

6. 7372119 - Cross-shaped Hall device having extensions with slits (2008-05-13),

7. 7355461 - Waveform generating circuit and spread spectrum clock generator (2008-04-08),

8. 7332944 - Frequency-controllable oscillator (2008-02-19),

9. 7330069 - Digital switching amplifier (2008-02-12),

10. 7323938 - Amplifier circuit and light receiving apparatus (2008-01-29),

11. 7262662 - Operational amplifier (2007-08-28),

12. 7233322 - Display panel drive circuit (2007-06-19),

13. 7231139 - Digital noise reduction for motors (2007-06-12),

14. 7203143 - Slew rate limiting circuit and optical disc apparatus (2007-04-10),

15. 7190205 - Variable resistance circuit (2007-03-13),

Company Overview

Asahi Kasei Microsystems Co., Ltd., based in Tokyo, specializes in advanced semiconductor technologies and electronic components. The company focuses on developing innovative solutions such as waveform generating circuits, spread spectrum clock generators, and digital BTSC decoders. Their expertise extends to power converters, optical disc devices, and semiconductor laser control systems. With a commitment to enhancing electronic performance, Asahi Kasei Microsystems plays a pivotal role in various technology sectors, contributing to the evolution of modern electronics.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

46 Patents

#839 in Tokyo

#1,810 in Japan

#15,133 in the World

Asahi Kasei Microsystems Co., Ltd.

Forward Citations = 295

57 inventors:

Koji Tomioka (4 out of 4 patents)

Kenji Nemoto (4 out of 4 patents)

Yoshiaki Konno (3 out of 3 patents)

4. Nagamasa Shiokawa (3 out of 3 patents)

5. Tamotsu Nagashima (2 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Asahi Kasei Microsystems Co., Ltd.. Retrieved from https://idiyas.com/company/asahi-kasei-microsystems-company

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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