Reexamination Certificate issued in 1995 for U.S.Patent Number 31789 for
caller ID telephone.

We are a company founded on the legacy
of one of the world’s great inventors.

 In August 1995, the world lost one of its most prolific inventors,
 Dr. Kazuo Hashimoto. Dr. Hashimoto was an inspired
 technologist who gave us thousands of advancements in the
 field of telephony. Today his legacy lives on through the work
 of PhoneTel Communications, Incorporated.

PhoneTel Communications, Inc.

In 1996, PhoneTel Communications, Incorporated was established to further Dr. Hashimoto’s vision and accomplishments.

The company now owns approximately 200 patents—many the result of Dr. Hashimoto’s work on the telephone answering machine. All of the company’s intellectual property is tightly connected to communications systems, with fundamental patents in: fax switching, fax-on-demand, paging notification, caller ID, voice messaging, cordless phones, video reservation systems, and other applications.

PhoneTel Communications is committed to fostering the development of new communications technology. Thus, the primary objective is to grant licenses for the use of an extensive portfolio of patents granted to Dr. Hashimoto.

PhoneTel Communications engages in the following activities:

Early patent  illustration of  Hashimoto’s  endless tape.

• Protecting its robust patent portfolio and granting licenses for use of the patents. PhoneTel manages its patent portfolio globally.

• Fostering innovation by forging associations with various technological institutions.

PhoneTel Patent Services Inc.

PhoneTel Patent Services has emerged as a separate company to manage valuable intellectual property and provide high quality patent services to other companies and inventors.