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:
Aug. 11, 1998
Filed:
Jan. 22, 1996
Yasuhiro Fukuzaki, Otone-machi, JP;
Wacom Co., Ltd., , JP;
Abstract
A position transducer and a position sensing method which permit the sensing of a coordinate of a plurality of position indicators without changing resonance frequencies of the plurality of position indicators. The position transducer is made up of a first group of antennas arranged one after the other in one of two directions which cross each other at right angles within a two-dimensional plane; a second group of antennas arranged one after the other in the other direction which is at right angles to the one direction within the two-dimensional plane. The method includes selecting an antenna capable of transmitting a more intensive electromagnetic wave to a position indicator to be measured compared with an electromagnetic wave sent to the other position indicator(s); transmitting an electromagnetic wave to the position indicator to be measured from the selected antenna; and receiving a response electromagnetic wave while scanning the antennas by switching the first and second groups of antennas one after the other.