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:
Apr. 29, 1980
Filed:
Jun. 05, 1978
Masahiro Ueno, Hitachi, JP;
Ikuro Masuda, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A diagnostic check system for a digital signal circuit, in which, in a state where a plurality of digital signals are being sent out from a processor such as a microcomputer through an interface and photo-coupling elements to a controlled apparatus, the processor periodically processes all the digital signals to simultaneously cause them to be the same signal mode '1' or '0' for a period of time that is too short for the controlled apparatus to respond to the change in the levels of the digital signals, and the processor also detects whether the modes of all the signals transferred from the photo-coupling elements to the controlled apparatus for the short period of time are coincident or not.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile