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. 04, 2001
Filed:
Jul. 09, 1999
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G 5/00 ; G01V 9/04 ; G08C 2/100 ;
U.S. Cl.
CPC ...
G09G 5/00 ; G01V 9/04 ; G08C 2/100 ;
Abstract
A coordinate-position detecting device comprising a white board as a coordinate-position entry area, and three reflecting members each for recursively reflecting light from two optical units. The angle between the write-in surface of the white board and the reflecting surface of the reflecting member at the bottom is an obtuse angle. Further, of angles obtained by dividing the above angle by a horizontal surface, the angle between the horizontal surface and the reflecting surface is an acute angle.