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:
Jul. 23, 1991
Filed:
Mar. 26, 1986
Applicant:
Inventors:
Shigeru Matsuoka, Hitachi, JP;
Masanobu Nagaoka, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364200 ; 364260 ; 364271 ; 364234 ; 36423782 ; 3642341 ; 364259 ; 3642593 ; 3642599 ; 3642594 ; 364242 ; 36423951 ; 3642445 ; 3642714 ; 364928 ; 3649281 ; 3649291 ; 364934 ; 3649341 ; 36493981 ; 3649428 ; 3649493 ; 3649495 ; 364950 ; 3649503 ;
Abstract
Signal transmission method and apparatus is an input unit for inputting signals through operation of keys. Addresses of the operated keys are extracted through scanning and sent to a signal processing unit, while signals from the signal processing unit are subsequently received. For allowing the scanning to be performed even at the times of signal sending and reception, the scanning period is divided into a number of intervals equal to the numbers of bits which constitute the signal to be transmitted, wherein the sending and reception of the signal to be transmitted are performed in synchronism with the scanning intervals.