22471 Aspan Street, Suite 280
Lake Forest, CA 92630

Tel: 949-457-8296

Fax: 949-457-8297

Email: [email protected]

Our Members

Katsuhiro Arai: Attorney at Law, US Patent Agent, Japanese Patent Attorney

Ayako Peters: Attorney at Law, US Patent Agent

Yuki Honjo: US Patent Agent

Kozue Larson: Assistant

Kristine Arai: Office Manager

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Legal Services for Intellectual Property

Patent and Trademark Prosecution

About Us

The office was founded by Katsuhiro Arai in 2008, after 14 years of experience at one of the leading and largest IP firms in the nation, Knobbe, Martens, Olson & Bear LLP, and 8 years of experience at a patent firm in Japan. We provide full services related to intellectual property law, often representing companies. This includes frequently working with foreign associates and other IP firms on behalf of our clients. We are familiar with both U.S. practice and Japanese practice, and often act as an extended IP division of our client companies. Fully fluent in English and Japanese, we maintain close communication with our clients in their language of preference.

Patent procurement services include drafting and prosecuting patent applications, and conducting patentability studies as well as infringement studies. Prosecution of a patent application requires extensive interaction with the U.S. Patent and Trademark Office (PTO), especially Patent Examiners, via written correspondence and interviews.

We also provide services in trademark procurement, maintenance, and searches.




Our Mission

We strive to provide high-quality legal services tailored to our clients' unique needs, while keeping costs at a minimum.

Business Principles

We maintain the highest ethical standards while providing exceptional IP legal services at excellent value. The client's best interest is paramount.

Areas of Practice

A significant portion of the office’s patent practice concerns semiconductor fabrication, communication technologies, pharmaceuticals, cosmetics, and technologies grounded in chemistry. With over three decades of experience, Mr. Arai has also handled a variety of other technologies. The office also handles trademarks, foreign and domestic.