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. 26, 1997
Filed:
Mar. 17, 1995
Yasuhiro Fukuzaki, Saitama-ken, JP;
Yuji Katsurahira, Saitama-ken, JP;
Wacom Co., Ltd., Saitama-ken, JP;
Abstract
A position pointing device for use with a digitizing tablet sequentially transmits plural different kinds of non-positional information to the tablet. The position pointing device varies a resonance characteristic of a resonance circuit in accordance with plural kinds of amount information, during each of plural sequential time slots. A tablet detects a resonance characteristic of the resonance circuit. The frequency and/or amplitude of the AC field coupled from the resonance circuit to the tablet are varied. The frequency variation is sufficiently small that it can be detected with a synchronous detector driven by a single frequency.