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:
Feb. 01, 2000
Filed:
Jan. 16, 1996
Yasuhiro Fukuzaki, Otone-machi, JP;
Wacom Co. Ltd., , JP;
Abstract
A position detecting system capable of making communications with a plurality of pointing devices without changing resonance circuits of said pointing devices, and a pointing device suitable for the position detecting system. The position detecting system detects positions of at least two cordless pointing devices on a two-dimensional plane and is equipped with a command electromagnetic wave transmitting circuit to transmit a command to the pointing device. Included in the position detecting system are a first group of antennae X1 to X11 arranged successively in one of the directions orthogonal to each other within the two-dimensional plane 11, a second group of antennae Y1 to Y8 arranged successively in the other direction orthogonal to the one direction within the two-dimensional plane 11, a selection circuit for, from the first and second antenna groups, selecting an antenna which is more strongly coupled to the pointing device to be measured than to the other pointing device in transmitting an electromagnetic wave, and a transmission circuit for transmitting an electromagnetic wave from the selected antenna to the pointing device to be measured.