Takeyuki Takagi

Image Forming Apparatus and Developing Cartridge

Process unit and image forming apparatus

Data processing device with a keyboard having pop-up keys

Foldable display, input device provided with the display and foldable keyboard, and personal computer provided with the input device

Key-holding structure of keyboard with curved operating surface of keys

Input device provided with windable display and foldable keyboard, and personal computer provided with the input device

Keyboard having connecting parts with downward open recesses

Image-forming device and developer cartridge for use therein

Key switch having elastic portions for facilitating attachment of scissors-type support linkage to keytop and holder, and removal of keytop from linkage

Image-forming device capable of determining information on a detachably mounted developer cartridge and developer cartridge for use therein