1
Murakami Azuma C O Wacom Co Lt, Aoki Kazuo C O Wacom Co Ltd, Yamanami Tusguya C O Wacom Co, Tomofuji Yoshiaki C O Wacom Co, Tanaka Takeshi C O Wacom Co Lt, Inashima Satoshi C O Wacom Co, Funahashi Takahiko C O Wacom C, Chikami Toshihide C O Wacom Co, Senda Toshiaki C O Wacom Co Lt: Electronic blackboard and accessories such as writing tools.. Wacom, December 27, 1989: EP0347725-A2 (54 worldwide citation)

The present invention discloses an electronic blackboard apparatus comprising an electronic blackboard portion (1), a writing tool (3), an eraser (4), an instruction rod (2), a position detection portion (11), a writing tool determination portion, a data processing portion (5), and an output portion ...


2
Murakami Azuma Wacom Comp Ltd, Yamanami Tsuguya Wacom Comp Lt, Funahashi Takahiko Wacom Comp, Senda Toshiaki Wacom Comp Ltd, Chikami Toshihide Wacom Comp L: Coordinate input system with input pen.. Wacom, March 22, 1989: EP0307667-A2 (23 worldwide citation)

A coordinate input system has a tablet (10) composed of an X-direction loop coil assembly and a Y-direction loop coil assembly, and an input pen (20) having a tuning circuit (29) the tuning frequency of which is variable about a predetermined frequency. The system has a coordinate detecting function ...


3
Yamanami Tsuguya, Funahashi Takahiko, Senda Toshiaki: Position detecting apparatus.. Wacom, March 16, 1988: EP0259894-A2 (22 worldwide citation)

A position detecting apparatus for detecting a position pointed by a pointer (60) on a system such as a digitizer has the following parts: a position detection section (10) having a plurality of loop coils (11-1 to 11-48) arrayed in a side-by-side fashion in the direction of position detection; a se ...


4
Yamanami Tsuguya, Senda Toshiaki: Coordinates input system.. Wacom, January 27, 1988: EP0254297-A2 (9 worldwide citation)

Disclosed is a coordinates input system having a tablet (1) constituting a coordinates input portion, a position designating device such as a stylus pen (2), and a position detection circuit (3) adapted to drive said tablet and detect a position at which coordinates are input by said position design ...


5
Murakami Azuma, Yamanami Tsuguya Sakura Sou, Funahashi Takahiko Puritekku, Senda Toshiaki Renge Sou: Position detecting apparatus.. Wacom, August 2, 1989: EP0326396-A2 (8 worldwide citation)

A position detecting apparatus for detecting a position pointed by an input pen which comprises: a position detection section (11) constituted by first and second coil groups (67, 73) each composed of a plurality of loop coils; an input pen (12) having a tuning circuit (86) having a predetermined fr ...


6
Yamanami Tsuguya, Senda Toshiaki: Position designating device.. Wacom, June 12, 1991: EP0432139-A2 (8 worldwide citation)

A position device for designating positions on a tablet of a coordinate input apparatus includes a capacitor (223) and a coil (222) forming a passive tuning circuit (22) which is arranged to receive electromagnetic waves from the coordinate input apparatus and to retransmit a resonance signal theret ...


7

8
Yamanami Tsuguya Maeshima Mans, Senda Toshiaki Maeshima Mansio: Coordinate input apparatus.. Wacom, March 16, 1988: EP0259841-A2 (6 worldwide citation)

A system for detecting the types and status of position designating devices is incorporated in a coordinates input apparatus having a tablet (1) constituting a coordinates input section, a plurality of position designating devices (2) of different types, and a position detecting circuit (3) for driv ...


9
Murakami Azuma C O Wacom Co Lt, Yamanami Tsuguya C O Wacom Co, Senda Toshiaki C O Wacom Co Lt, Tomofuji Yoshiaki C O Wacom Co, Inashima Satoshi C O Wacom Co, Mizuno Hiroshi C O Wacom Co Lt: Electronic blackboard system, marke and eraser therefor.. Wacom, March 22, 1989: EP0307893-A2 (5 worldwide citation)

An electronic blackboard system comprises an electronic blackboard section, a writing instrument, an eraser, a designating rod, a position detecting section, a writing instrument discriminating section, a data processing section, and an output section. When image information such as characters and f ...


10
Murakami Azuma C O Wacom Co Lt, Yamanami Tuguya C O Wacom Co L, Funahashi Takahiko C O Wacom C, Senda Toshiaki C O Wacom Co Lt, Aoki Kazuo C O Wacom Co Ltd, Sugiyama Keiichi C O Wacom Co, Miyamori Nobuyuki C O Wacom Co, Kikuchi Akio C O Wacom Co Ltd, Abe Manabu C O Wacom Co Ltd: Position detecting device.. Wacom, July 5, 1989: EP0322675-A2 (4 worldwide citation)

A position detecting device provided with a position pointer (2) having a tuning circuit, a tablet (1) for position detection having an electric wave generator for generating an electric wave at a frequency equal to the resonance frequency of the tuning circuit and an electric wave detector for dete ...