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
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Tokyo Office

Telephone: +81-3-6212-0550
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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.

Ajinomoto Delaware Litigation Heads Toward Victory with Patent Owner's Asserted Claims Found Indefinite In Claim Construction Ruling

  • July 2, 2020
  • Firm News

Associated Practices

Recently Judge Mitchell S. Goldberg for the U.S. District Court for the District of Delaware approved and adopted Magistrate Judge Lloret’s Markman decision in its entirety, finding Plaintiff Kyowa Hakko Bio Co.’s (KHB) asserted patent claims invalid as indefinite. KHB had asserted infringement of its U.S. Patent RE45,723 allegedly covering an Ajinomoto process for manufacturing glutamic acid commonly used as an additive in food products.

The decision marks the end of a protracted claim construction period in the lawsuit.  As a result of Oblon’s work – one of the largest law firms in the U.S. focused exclusively on intellectual property law – Ajinomoto’s U.S. business ventures relating to glutamic acid will continue without interruption.

The decision also highlights that U.S. claim construction determinations can be confirmed by statements made to a foreign patent office.  According to Judge Goldberg, KHB’s statements at a foreign patent office constituted “blatant admissions” regarding the disputed claim term in the context of the same patent specification. 

Ajinomoto is represented by Oblon Partners Eric Schweibenz and Stephen Baxter