Sadafuku Hayashi

This inventor holds 157 USPTO granted patents and 60 published patent applications, plus 9 CIPO patents and 78 EPO patents, primarily in 5G Communication Systems (CPC class H04W92-20). Top assignees: Nec Corporation, Nec C Orporation, Lenovo Innovations Limited (Hong Kong). Active years: 2008-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sadafuku Hayashi. Retrieved from https://idiyas.com/inventor/sadafuku-hayashi

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

USPTO Granted Patents = 157 (Patent Applications = 60)

% Patents Active = 94.9

CIPO Patents = 9

EPO Patents = 78 (Patent Applications = 105)

Average Co-Inventor Count = 1.8

ph-index = 5

Forward Citations = 150(Granted Patents)

Forward Citations (Not Self Cited) = 92(Dec 10, 2025)

Inventors with similar research interests:

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Location History:

Minato-ku, JP (2013 - 2019)
Tokyo, JP (2008 - 2024)

Company Filing History:

Lenovo Innovations Limited (Hong Kong)

patents

4. 1 out of 2,963

Motorola Mobility LLC

patents

Years Active: 2008-2026

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Areas of Expertise:

5G Network

Radio Access Network

Network Slicing

User Equipment

Control-Plane Messages

Power Consumption

Radio Terminal

Central Unit

Distributed Unit

Core Network Node

Communication System

Radio Station

157 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12772110 - Radio access network node, user equipment, and methods therefor (2026-10-20),

2. 12470908 - Communication system (2025-11-11),

3. 12457548 - Communication system and methods that adapt RRC procedures to a 5G network implementing network slicing (2025-10-28),

4. 12446092 - Master node, secondary node, and methods therefor (2025-10-14),

5. 12445952 - Communication system and methods that adapt RRC procedures to a 5G network implementing network slicing (2025-10-14),

6. 12432619 - Methods and apparatuses for transmitting control-plane messages in cells using different radio access technologies (2025-09-30),

7. 12432568 - Radio access network node, radio terminal, core network node, and method therefor (2025-09-30),

8. 12356273 - Distributed unit, central unit, radio access network node, and method therefor (2025-07-08),

9. 12349161 - Radio access network node, radio terminal, and methods and non-transitory computer-readable media therefor (2025-07-01),

10. 12335791 - Radio access network node, radio terminal, and method therefor (2025-06-17),

11. 12302224 - Radio access network node, radio terminal, and methods and non transitory computer-readable media therefor (2025-05-13),

12. 12294896 - Radio access network node, radio terminal, core network node, and method therefor (2025-05-06),

13. 12250626 - Method, a user equipment, and a radio station for optimizing user equipment power consumption on activated secondary cells (2025-03-11),

14. 12245315 - Ran node, radio terminal, and methods therefor (2025-03-04),

15. 12231966 - Radio access network node, radio terminal, and method therefor (2025-02-18),

Title: The Visionary Inventor: Sadafuku Hayashi

Introduction:

Sadafuku Hayashi, a visionary inventor from Tokyo, Japan, is recognized for his outstanding contributions to the world of technology. With an impressive portfolio of 128 patents, his relentless pursuit of innovation continues to shape the future of the industry.

Latest Patents:

Among his latest patents is the "Distributed unit, radio terminal, and methods therefor", where a distributed unit changes the active downlink Bandwidth Part of radio terminals in response to signaling messages. Another notable patent is the "Distributed unit, central unit, and method for addition of activated or dormant secondary cell", which enables direct configuration of a secondary cell state in carrier aggregation.

Career Highlights:

Sadafuku Hayashi has made significant strides in his career, working at renowned companies such as NEC Corporation and Lenovo Innovations Limited. His innovative spirit and dedication to advancement have led to groundbreaking inventions that have reshaped the technological landscape.

Collaborations:

Throughout his career, Sadafuku Hayashi has collaborated with talented individuals such as Hisashi Futaki and Yoshio Ueda. Their collective efforts have resulted in innovative solutions that have garnered global recognition and acclaim.

Conclusion:

In conclusion, Sadafuku Hayashi stands as a visionary inventor whose passion for creating transformative solutions has solidified his status as a trailblazer in the world of technology. His extensive patent portfolio and collaborative efforts reflect his relentless pursuit of innovation, making him a pioneering figure in the industry.

Profile summary based on public USPTO records.