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:
Sep. 28, 2004
Filed:
Oct. 23, 2001
Takashi Kitada, Ogori, JP;
Kazuhiro Watanabe, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A system for detecting a position of a stylus movable on an interactive board includes a position information transmitter and information detection sections. The stylus has the transmitter for transmitting to the detection sections electromagnetic wave signals or light signals, and ultrasonic wave signals. The position is detected based on measurement of direct distances for signal transmission between the stylus and the detection sections. The detected position information is output to a personal computer, image projector, printer, etc. Each detection section has an opening sized so that the ultrasonic waves are advantageously transmitted through the opening and substantially radially from its center to its piezoelectric element.