Quote:
Therefore, it is possible to consider that a vibration generating source be incorporated in a housing of the controller; however, in such a case, it is necessary to change the controller as a whole, and therefore, a person who intends to play games in which the vibration is generated must obtain a specific controller, and accordingly, it is not economical.
The present invention is a controller pack detachably attached to a controller which is connected to a video game machine, comprising a case; a vibration source which is attached to the case and generates a vibration using electric power; and a driver circuit which applies the electric power to the vibration source in response to a command signal from the game machine.
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Nevermind... it's talking about Nintendo's Rumble Pak for the 64
..but it says filed (feb 2001)... so I'm confused.