the firm's post-grant practitioners are some of the most experienced in the country.


Artificial Intelligence (AI)
Artificial Intelligence (AI)
Digital Health
Digital Health
Energy & Renewables
Energy & Renewables

Fast Facts

About Our

Law Firm

About Our Law Firm

Headquartered within steps of the USPTO with an affiliate office in Tokyo, Oblon is one of the largest law firms in the United States focused exclusively on intellectual property law.

Get to know our


Get to know our History

Norman Oblon with Stanley Fisher and Marvin Spivak launched what was to become Oblon, McClelland, Maier & Neustadt, LLP, one of the nation's leading full-service intellectual property law firms.

Our Local and

Global Reach

Our Local and Global Reach

Outside the US, we service companies based in Japan, France, Germany, Italy, Saudi Arabia, and farther corners of the world. Our culturally aware attorneys speak many languages, including Japanese, French, German, Mandarin, Korean, Russian, Arabic, Farsi, Chinese.

A few of our


A few of our ACCOLADES

Oblon's professionals provide industry-leading IP legal services to many of the world's most admired innovators and brands.




From the minute you walk through our doors, you'll become a valuable part of a team that fosters a culture of innovation, client service and collegiality.

A few ways to

GET In Touch

A few ways to GET In Touch
US Office

Telephone: 703-413-3000
Learn More +

Tokyo Office

Telephone: +81-3-6212-0550
Learn More +


Patent Forms

Downloadable Patent Forms

The United States Patent and Trademark Office (USPTO) issued final rules implementing the inventor's oath or declaration provisions of the America Invents Act (AIA) on August 14, 2012.

Joint Symposium on U.S. and European Patent Practice - Important Aspects for Practitioners

Schedule :

The Oblon and Maiwald firms are pleased to announce a Joint Symposium on U.S. and European Patent Practice - Important Aspects for Practitioners. The symposium is to be held IN PERSON on 1 June 2023 at 13:00 JST in AP Marunouchi, Tokyo.  

Please join us to learn about recent developments and current aspects of IP practice in the U.S. and Europe.  Improving COVID-19 pandemic conditions makes it possible to present our annual seminar on an in-person basis only this year, however, we will still observe appropriate safety measures.

At this joint symposium, we will together examine selected current aspects of IP practice related to prosecuting applications and enforcing patents in the U.S. and in Europe. While similarities exist, applicants for U.S. and European patents need to be aware of the peculiarities and most recent developments in each system in order to achieve the best results. In particular, the symposium will address the following important topics for today’s practitioners:

1.     Intellectual property and e-mobility in Europe

2.     Updates on claim construction and indefiniteness issues in view of the 2023 Federal Circuit decisions in Salazar v. AT&T and Grace Instrument v. Chandler

3.     Start of the Unitary Patent System, a new era in Europe

4.     Ex parte Appeals before the U.S. Patent and Trademark Office

5.     Updates on extrinsic evidence and plausibility after G 2/21 in Europe

6.     Enablement issues in the U.S., is the Supreme Court about to change the law?

Presenters will include: Alexander Ortlieb (Maiwald), David Longo (Oblon), Naho Fujimoto (Maiwald), Yuki Onoe (Oblon), Derk Vos (Maiwald), and Dan Pereira (Oblon).

Drinks and hors d’oeuvres will be provided at a casual reception following the symposium.

A link to register can be found here.

Alternatively, you may register by e-mail to or If registering by email, please include the attendee’s name(s), company, and contact information. The final registration deadline is May 26, 2023. Attendance is limited and registration will be on a first-come, first-served basis. 

If you have any questions, please email