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For the Inventor, By the Inventor

Kawasaki, Japan

Takahiko Yamauchi

This inventor holds 13 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 1983-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takahiko Yamauchi. Retrieved from https://idiyas.com/inventor/takahiko-yamauchi

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 7

Forward Citations = 165(Granted Patents)


Location History:

  • Yokohama, JP (1983)
  • Kawasaki, JP (1984 - 1989)

Company Filing History:

goldMedal13 out of 39,378 
 
Fujitsu Corporation
 patents

Years Active: 1983-1989

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13 patents (USPTO):Explore Patents
1. 4809046 - Semiconductor memory device (1989-02-28),
2. 4603404 - Semiconductor memory device with redundant cells (1986-07-29),
3. 4587639 - Static semiconductor memory device incorporating redundancy memory cells (1986-05-06),
4. 4581549 - CMIS chip-select circuit (1986-04-08),
5. 4573147 - Semiconductor memory device (1986-02-25),
6. 4571510 - Decoder circuit (1986-02-18),
7. 4563754 - Static-type random-access memory device (1986-01-07),
8. 4549199 - Semiconductor device providing a contact structure which can be (1985-10-22),
9. 4507574 - Constant operation speed logic circuit (1985-03-26),
10. 4504743 - Semiconductor resistor element (1985-03-12),
11. 4449066 - Buffer circuit for generating output signals having short recovery time (1984-05-15),
12. 4439841 - Semiconductor memory devices (1984-03-27),
13. 4375039 - Sense amplifier circuit (1983-02-22),

Title: Takahiko Yamauchi: Innovator in Semiconductor Technology

Introduction

Takahiko Yamauchi is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 13 patents. His work has focused on improving the performance and reliability of semiconductor memory devices.

Latest Patents

Yamauchi's latest patents include a static-type semiconductor memory device featuring a three-layer structure. This innovative design incorporates gate-electrode wiring lines formed from a first conductive layer of polycrystalline silicon, while word lines, ground lines, and power supply lines are created from a second conductive layer of aluminum. The bit lines, which extend in a column direction, are formed from a third conductive layer of aluminum, enhancing integration, operating speed, and manufacturing yield, while also addressing soft errors caused by alpha particles. Another notable patent is for a semiconductor memory device with redundant cells. This device arranges memory cells in a matrix form and includes a mechanism to switch to predetermined redundant rows or columns when defective cells are detected, ensuring continued functionality.

Career Highlights

Yamauchi is currently employed at Fujitsu Corporation, where he continues to innovate in semiconductor technology. His work has been instrumental in advancing the capabilities of memory devices, making them more efficient and reliable.

Collaborations

Some of his notable coworkers include Keizo Aoyama and Teruo Seki, who have collaborated with him on various projects within the semiconductor field.

Conclusion

Takahiko Yamauchi's contributions to semiconductor technology have had a lasting impact on the industry. His innovative patents and dedication to improving memory devices highlight his role as a leading inventor in this field.

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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