Teletext and teleconferencing (1970 - Jul 85)
Subtitle: citations from the U.S. Patent bibliographic database.
Contributors: United States. Patent and Trademark Office.
Series: PB85-865285
Publisher: National Technical Information Service
Published: 1985
Place of publication: Springfield, VA
Language: eng
Format: Microform
Number of pages: 52
Subjects: Teletext (Data transmission system) -- Patents -- Bibliography.; Teleconferencing -- Patents -- Bibliography.
Notes: Includes index.