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. 26, 2013
Filed:
May. 18, 2009
Sang Hyun Han, Anyang-si, KR;
Sang Hyun Han, Anyang-si, KR;
Pointchips Co., Ltd., Seoul, KR;
Abstract
Disclosed herein is a membrane switch sheet for a switch matrix-type key input apparatus. The membrane switch sheet is used in a switch matrix-type key input apparatus, including a plurality of switch contacts, so as to prevent the occurrence of a ghost key phenomenon. The membrane switch sheet includes at least one film wired through a single patterning process using only ink having low conductivity so as to have resistors having a same resistance value, with distances between start points of lines of a switch matrix in a column scan direction and the switch contacts being set to the same value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile