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For the Inventor, By the Inventor

Kyoto, Japan

Kei Nishioka

This inventor holds 12 USPTO granted patents. Top assignee: Rohm Co., Ltd.. Active years: 1993-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kei Nishioka. Retrieved from https://idiyas.com/inventor/kei-nishioka

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

Calculating rank
USPTO Granted Patents = 12

% Patents Active = 83.3

Average Co-Inventor Count = 1.5

ph-index = 4

Forward Citations = 83(Granted Patents)


Company Filing History:

goldMedal12 out of 6,021 
 
Rohm Co., Ltd.
 patents

Years Active: 1993-2007

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12 patents (USPTO):Explore Patents
1. 7183655 - Packaged semiconductor device (2007-02-27),
2. 6853869 - Method and apparatus for generating surround-sound data (2005-02-08),
3. 6556036 - Semiconductor integrated circuit device (2003-04-29),
4. 5570427 - Muting control circuit (1996-10-29),
5. 5508658 - Power amplifier circuit for audio signal and audio device using the same (1996-04-16),
6. 5483197 - Power amplifier circuit for audio signal and audio device using the same (1996-01-09),
7. 5479134 - Power amplifier circuit for audio signal and audio device using the same (1995-12-26),
8. 5450036 - Power amplifier circuit for audio signal and audio device using the same (1995-09-12),
9. 5424684 - Power amplifier circuit for audio signal and audio device using the same (1995-06-13),
10. 5371476 - Amplifying circuit (1994-12-06),
11. 5367412 - Recording/reproducing circuit and recording/reproducing apparatus having (1994-11-22),
12. 5220613 - Audio amplifier circuit (1993-06-15),

Title: Kei Nishioka: Innovator in Semiconductor and Audio Technology

Introduction

Kei Nishioka is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the fields of semiconductor devices and audio technology. With a total of 12 patents to his name, Nishioka continues to push the boundaries of innovation.

Latest Patents

One of Nishioka's latest patents is for a packaged semiconductor device. This device features an integrated chip and a non-integrated chip. The integrated chip includes an integrated circuit and first bump pads formed with a narrow pitch. The non-integrated chip has second bump pads that face the first bump pads, along with lead pads formed with a wide pitch to allow for wire connections. The two chips are connected via bumps and sealed in resin, enabling a low-cost packaged semiconductor device that can be easily mounted on a motherboard.

Another notable patent is a method and apparatus for generating surround-sound data. This invention includes a surround-sound circuit that utilizes a delay time memory to store a digital audio input signal. The stored input signal is then output as a surround-sound signal after a predetermined time. The input signal is compressed before being stored, which significantly reduces the amount of data needed in memory without compromising audio quality.

Career Highlights

Kei Nishioka is currently employed at Rohm Co., Ltd., where he continues to develop innovative technologies. His work has had a lasting impact on the semiconductor and audio industries, showcasing his expertise and dedication to advancing technology.

Collaborations

Nishioka has collaborated with several talented individuals, including Masanori Fujisawa and Katsumi Kusaba. These partnerships have contributed to the successful development of his inventions and patents.

Conclusion

Kei Nishioka is a distinguished inventor whose work in semiconductor devices and audio technology has led to numerous patents. His innovative spirit and collaborative efforts continue to shape the future of these industries.

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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