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:
Jul. 19, 2011
Filed:
Feb. 20, 2007
Sadao Takahashi, Kanagawa, JP;
Satoshi Suga, Kanagawa, JP;
Toshiyuki Furuta, Kanagawa, JP;
Tomohiko Beppu, Kanagawa, JP;
Hirofumi Horikawa, Kanagawa, JP;
Yuuta Hamada, Tokyo, JP;
Sadao Takahashi, Kanagawa, JP;
Satoshi Suga, Kanagawa, JP;
Toshiyuki Furuta, Kanagawa, JP;
Tomohiko Beppu, Kanagawa, JP;
Hirofumi Horikawa, Kanagawa, JP;
Yuuta Hamada, Tokyo, JP;
Ricoh Company, Limited, Tokyo, JP;
Abstract
A pen includes a first speaker that outputs a first signal and a second speaker that outputs a second signal. The first and second speakers are located away from a tip of the pen at respectively different locations. The second signal is delayed with respect to the first signal by a time shorter than a cycle of the first signal. An interpolation time is set between the times of generation of the first and second signals. Interpolated positions of the first and second speakers at the interpolation time are estimated, and position of the tip of the pen is calculated from the interpolated positions of the first and second speakers.