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:
Jun. 13, 1995
Filed:
Dec. 04, 1992
Kazuko Sasaki, Tokyo, JP;
Takashi Hazui, Moriguchi, JP;
Hitoshi Ebihara, Tokyo, JP;
Shuichi Sakaguchi, Yamato, JP;
Akira Kamakura, Kawasaki, JP;
Sadayoshi Sato, Kadoma, JP;
Fujitsu Limited, all of, JP;
Matsushita Electric Industrial Co. Ltd., all of, JP;
Ascii Corp., all of, JP;
Sanyo Electric Co. Ltd., all of, JP;
Sony Corp., all of, JP;
PFU Limited, all of, JP;
Abstract
A method differentiates simultaneous and sequential key strokes by detecting simultaneous key strokes if two keys are pushed within a judging time T.sub.L. The method includes the steps of (a) measuring a first time T.sub.1 from a time when a first key is pushed to a time when a second key is pushed, and a second time T.sub.2 from the time when the second key is pushed to a time when one of the first and second keys is released, (b) comparing the first and second times T.sub.1 and T.sub.2 with an arbitrary threshold function T.sub.C which is set within the judging time T.sub.L, and (c) differentiating whether key strokes of the first and second keys are simultaneous or sequential based on a comparison result of the step (b).