Inventor
TAKEKAWA KENICHI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “TAKEKAWA KENICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
10 patentsUS6335724B1Jan 1, 2002
Method and device for inputting coordinate-position and a display board system
RICOH KK206 citations98
US6828959B2Dec 7, 2004
Method and device for inputting coordinate-position and a display board system
RICOH KK93 citations97
US6587099B2Jul 1, 2003
Coordinate input/detection device detecting installation position of light-receiving device used for detecting coordinates
RICOH KK109 citations97
US6532006B1Mar 11, 2003
Coordinates input device, coordinates input method, a display board system
RICOH KK79 citations97
US6570103B1May 27, 2003
Method and apparatus for coordinate inputting capable of effectively using a laser ray
RICOH KK95 citations96
US6504532B1Jan 7, 2003
Coordinates detection apparatus
RICOH KK101 citations95
US6352351B1Mar 5, 2002
Method and apparatus for inputting coordinates
RICOH KK91 citations95
US6285359B1Sep 4, 2001
Coordinate-position detecting device and a method for detecting the coordinate-position
RICOH KK36 citations92
US7113174B1Sep 26, 2006
Coordinate inputting/detecting apparatus and method designed to avoid a trailing phenomenon
RICOH KK49 citations91
US6823481B2Nov 23, 2004
Optical coordinate input/detection device with optical-unit positioning error correcting function
RICOH KK7 citations73