Latest News

Important Notice

Our affiliated office, S&E CPA Office, Tokyo, will cease operations as of November 25th, 2024.

We will contact our clients individually regarding support for audit services for the fiscal year ending December 2024.

Shogo Matsunaga has been named to the IAM Strategy 300: The World’s Leading IP Strategists 2024.

August 20, 2024

‘Examples of NDA Provisions and Key Points of Post-Conclusion Management,’ by Shogo Matsunaga in May 2024 Issue of Business Houmu

March 28, 2024

Shogo Matsunaga’s first article for IAM Trade Secrets Hub 2024 is now available for reading.

March 11, 2024

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Who are we?

Founded in Japan in 1910, Sonderhoff & Einsel is a multicultural firm with professionals from Europe, Japan, the US and China. Our legal, IP, tax and accounting experts provide practical, goal-oriented solutions across a wide range of practice areas to our international and Japanese clients.

Learn more…

Newsletters

Explanation of the main Points of the Amended Implementing Regulations of the Patent Law of the People’s Republic of China

January 19, 2024

USPTO to begin issuing certificates of correction electronically beginning on January 30, 2024

January 5, 2024

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“Suspension of Examination for Divisional Applications during the Review of the Parent Application”

April 4, 2023

“IP High Court Decision: Japanese Patent Right Enforceable Even If Part of the Infringement Takes Place Outside Japan”

October 6, 2022

“Some Multiple Dependent Claims Will Be Rejected in Japan – What is the Influence on Foreign Applicants?”

March 8, 2022

IP Practice: On May 14, 2021, the Diet passed a bill to partially amend the Patent Law and other related laws

June 16, 2021

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Events & SEMINARS

Shogo Matsunaga spoke on behalf of INTA’s Anticounterfeiting Committeea on a panel discussion “IP and Innovation, Joining Forces with Consumers to Fight Counterfeits” with the JPO and Amazon.

May 19, 2023

On December 6, 2022, Sonderhoff & Einsel Law and Patent Office held a seminar on “Unitary Patent and Unified Patent Court”

December 12, 2022

ON FEBRUARY 17, 2021, PATENT ATTORNEYS FELIX EINSEL, MASAKO BARNARD AND HIROYUKI YAJIMA HELD AN ONLINE SEMINAR FOR VPP MITTE SÜD IN GERMANY

September 2, 2021

On February 05, 2020, S&E held an EU Design Study Session titled, “Design Protection in Europe – a Strong IP Right”.

September 2, 2021

On November 06, 2019, S&E held an EU Life Science IP Study Session titled, “Patenting in the Field of Biotechnology, Biology and Pharmacy at the EPO – Problems and Possibilities”.

August 31, 2021

ON OCTOBER 17, 2019, S&E HELD AN EU IP LAW SEMINAR

August 31, 2021

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Tokyo Location
Shin Marunouchi Center Bldg. 18th Floor
1-6-2 Marunouchi, Chiyoda-ku
Tokyo 100-0005
Within Tokyo
Our office is located within walking distance from Tokyo Station (5 min) and Otemachi Station (5 min).
Tokyo Station: Marunouchi North Exit (towards Marunouchi Oazo Complex)
Otemachi Station: Exit B2b
From Narita Airport
We suggest taking the Narita Express from Narita Airport to Tokyo Station. Duration: about 60 min.
From Haneda Airport
We recommend taking the Tokyo Monorail, changing to Tokyo Station-bound JR lines at Hamamatsucho Station.

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Latest News

Shogo Matsunaga has been named to the IAM Strategy 300: The World’s Leading IP Strategists 2024.

‘Examples of NDA Provisions and Key Points of Post-Conclusion Management,’ by Shogo Matsunaga in May 2024 Issue of Business Houmu

Shogo Matsunaga’s first article for IAM Trade Secrets Hub 2024 is now available for reading.

Who are we?

Newsletters

Explanation of the main Points of the Amended Implementing Regulations of the Patent Law of the People’s Republic of China

USPTO to begin issuing certificates of correction electronically beginning on January 30, 2024

“Suspension of Examination for Divisional Applications during the Review of the Parent Application”

“IP High Court Decision: Japanese Patent Right Enforceable Even If Part of the Infringement Takes Place Outside Japan”

“Some Multiple Dependent Claims Will Be Rejected in Japan – What is the Influence on Foreign Applicants?”

IP Practice: On May 14, 2021, the Diet passed a bill to partially amend the Patent Law and other related laws

Events & SEMINARS

Shogo Matsunaga spoke on behalf of INTA’s Anticounterfeiting Committeea on a panel discussion “IP and Innovation, Joining Forces with Consumers to Fight Counterfeits” with the JPO and Amazon.

On December 6, 2022, Sonderhoff & Einsel Law and Patent Office held a seminar on “Unitary Patent and Unified Patent Court”

ON FEBRUARY 17, 2021, PATENT ATTORNEYS FELIX EINSEL, MASAKO BARNARD AND HIROYUKI YAJIMA HELD AN ONLINE SEMINAR FOR VPP MITTE SÜD IN GERMANY

On February 05, 2020, S&E held an EU Design Study Session titled, “Design Protection in Europe – a Strong IP Right”.

On November 06, 2019, S&E held an EU Life Science IP Study Session titled, “Patenting in the Field of Biotechnology, Biology and Pharmacy at the EPO – Problems and Possibilities”.

ON OCTOBER 17, 2019, S&E HELD AN EU IP LAW SEMINAR

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S&E CPA Office, Tokyo