The establishment of today’s Hayashi, Doi & Associates dates back to 1992 when Tsunenori Hayashi established Hayashi & Associates, which subsequently merged with Doi’s firm in 1996.
Although not huge in scale, the Firm is characterized by the following attributes. First, we handle an almost equal ratio of domestic and overseas applications, with patent attorneys and office staff on hand to offer comprehensive assistance with patent, trademark, and design applications. Moreover, although medium-sized, we have many patent attorneys and maintain an efficient operational structure upheld by the various management systems and the utilization of IT.
Furthermore, through the provision of a rational performance assessment system that our staff can relate to, the Firm aspires to provide a workplace that is capable of accommodating a range of lifestyles and allows our staff to adopt a healthy work-life balance.
In recent years, the intellectual property industry has undergone significant change. We strive to cope flexibly with this change and our staff members continue to work hard in contributing to clients through the provision of our IP services.
Finally, I would like to introduce our philosophies:
We will strive to make high-level contributions to clients and society through the provision of IP services, and work hard to earn respect by demonstrating dependability.
All our staff will make continuous efforts to achieve personal growth through their work in IP, and the Firm will work to foster an open culture characterized by mutual development through healthy competition.
Kenji Doi Patent Attorney and Representative Partner
Tsunenori Hayashi established Hayashi & Associates
Kenji Doi established Doi & Associates
The two firms merged to form Hayashi, Doi & Associates
Sendai office was established
Yokohama office was established
Toshou-Bldg. No.3, 3-9-5 Shin-yokohama, Kohoku-ku, Yokohama-shi, 222-0033 Japan
The 21ST Century Plaza Research Center No.1-A 2-1-40 Takamori, Izumi-ku, Sendai-shi, 981-3003 Japan
5-1-7-102 Kounandai, Kounan-ku, Yokohama-shi, 234-0054 Japan
Domestic and overseas patent applications
Applications for utility model registration
Applications for trademark registration
Applications for design registration
Representation in specific infringement case
Representation in suit for canceling a trial decision
Prior art search
Representation for applying a standard essential patent
11 Patent Attorneys
3 Patent Engineers
1 General Administrative Staff
Hayashi,Doi & Associates Sendai Office
Patent attorney Mr. Matsueda works at the Sendai office – a branch of the main office in Shin-Yokohama – and dedicates himself to clients in Sendai, Miyagi prefecture, and other parts of the Tohoku region.
With progress in transportation and communication networks making it easier for those in regions distanced from Tokyo to approach and ask patent offices in the metropolis to file patent applications for them, Mr. Matsueda always makes efforts to provide clients in Tohoku detailed services which can only be accomplished locally.
Auditor, Tohoku Branch of Japan Patent Attorneys Association
Business Support Advisor, Tohoku Branch of Organization for Small & Medium Enterprises and Regional Innovation
Registered Specialist of Miyagi Organization for Industry Promotion
Assigned Specialist of Miyagi Institute of Invention and Innovation
Director of Intellectual Property Support Team, Tohoku Economic Federation
Patent, Utility Model, Design, Trademark
Technical Practice Areas
Electrical and Computer technology including Electro mechanics and computer software
B.S, Applied Physics, Tohoku University
Master of Graduate school of Law, Tohoku University
Nippon Credit Bank
Nakamura & Partners
Joined Hayashi, Doi & Associates