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:
Jan. 23, 1979
Filed:
Mar. 24, 1977
Masakazu Okada, Hitachi, JP;
Jushi Ide, Hitachi, JP;
Seiichi Yasumoto, Hitachi, JP;
Hitoshi Fushimi, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A loop type data highway system in which a plurality of data transmission control stations (abbreviated hereinafter as stations) are connected to a single loop transmission line for data transmission and reception between any desired ones. A transmit station transmitting data makes a compare check to compare successive predetermined unit lengths of the transmitted data with the corresponding ones of the data returning after travelling round the loop, thereby detecting an error occurring during the data transmission when non-coincidence exists therebetween. A receive station receiving the data monitors the number of data words to be received, thereby detecting an error occurring during the data transmission when a data transmission end signal is detected prior to arrival of all the data words. Upon detection of the error occurring during the data transmission, the transmit station transmits the data transmission end signal to the receive station to inform the receive station of occurrence of the error.