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:
Aug. 08, 1995
Filed:
Jun. 05, 1992
Takao Wakabayashi, Osaka, JP;
Nakanishi Metal Works Co., Ltd., Osaka, JP;
Abstract
A signal transmitter-receiver system comprising first and second transmitter-receiver units interconnected by a signal transmission line, a first transmitter-receiver unit including a first transmission circuit for delivering a selected one of a plurality of a.c. signals each having a distinct phase difference with respect to a reference a.c. signal to the signal transmission line at each of successive predetermined communication time interval, the second transmitter-receiver unit including a second receiving circuit for identifying the phase difference of the a.c. signal or the signal transmission line with respect to the reference a.c. signal at each communication time interval, the second transmitter-receiver unit including a second transmission circuit for changing the combination of positive and negative amplitudes of the a.c. signal on the signal transmission line to one of a plurality of states at each communication time interval, the first transmitter-receiver unit including a first receiver circuit for identifying the state of the combination of positive and negative amplitudes of the a.c. signal of the signal transmission line at each communication time interval.