The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1982
Filed:
Mar. 03, 1980
Noriaki Fujimura, Tokyo, JP;
Tsuneo Kinoshita, Inagi, JP;
Tadashi Aono, Kawasaki, JP;
Takashi Kaku, Kawasaki, JP;
Yasuya Tanaka, Kawasaki, JP;
Nippon Telegraph and Telephone Public Corporation, both of, JP;
Fujitsu Limited, both of, JP;
Abstract
A data transmission system wherein a transmitter always transmits the carrier to a receiver and modulates the carrier by using the sending data and a receiver demodulates the sending data, wherein, in order to discriminate whether the data demodulated in the receiver is sending data or not during an existing sending data period, the transmitter converts specified bits of sending data and then transmits and the receiver discriminates the sending data existing period according to detection of such conversion being carried out.