Company Filing History:

2 out of 243

At&t Information Systems Inc.

patents

2 out of 3,345

At&t Bell Laboratories

patents

1 out of 386

American Telephone and Telegraph, Co.

where one patent can have more than one assignee

Years Active: 1987-1995

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5416772 - Apparatus for insertion of overhead protocol data into a switched data (1995-05-16),

2. 5212578 - Selection of transmission facilities using optical wavelength division (1993-05-18),

3. 4999832 - Broadband multirate switching architecture (1991-03-12),

4. 4769833 - Wideband switching system (1988-09-06),

5. 4635249 - Glitchless clock signal control circuit for a duplicated system (1987-01-06),

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Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.

For the Inventor, By the Inventor

John S Helton

Location History:

Company Filing History:

Years Active: 1987-1995