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:
Oct. 14, 1980
Filed:
Jun. 26, 1978
Applicant:
Inventors:
Fumiyuki Inose, San Jose, CA (US);
Hirohide Endo, Cupertino, CA (US);
Akio Komatsu, Cupertino, CA (US);
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ; H05K / ;
U.S. Cl.
CPC ...
200 / ; 174 685 ; 2001 / ; 200292 ; 361409 ;
Abstract
A keyboard structure permitting the interconnection of several hundred flexible key structures in a compact area. The structure includes a matrix of key cells disposed on an insulating surface, the row elements being commonly connected by conductive paths on the surface while the column elements are electrically separate. A contact point for each row and each column element extends to the opposite side of the insulating surface. These contact points are so disposed that parallel conductive paths which run only in the vertical direction may be used to provide row-select and column-select indications.