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:
Mar. 22, 1988
Filed:
Jul. 08, 1987
Masaaki Kitajima, Hitachiohta, JP;
Hideaki Kawakami, Mito, JP;
Yoshiharu Nagae, Hitachi, JP;
Masahiro Takasaka, Hitachiohta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An information holding device comprising a pair of substrates whose opposing surfaces are formed with electrodes on one side and electrodes on the other side so that they may oppose and that opposing parts between the electrodes on the one side and those on the other side may form a matrix as a whole, a dielectric which is held between said pair of substrates, means to change a capacitance of the dielectric in any desired one of the opposing parts, and detection means to simultaneously detect the capacitances of at least two of the opposing parts between the electrodes on the one side and those on the other side.