Fuji Xerox Co., Ltd.

Wacom Co., Ltd.

Hiroaki Shiokawa

Naoya Nishizawa

Tatsunori Kato

Kentaro Matsumoto

Provided is an electronic pen including an electronic pen main body unit having a pen shape, and having a pen tip that, in operation, performs a position indication, the pen tip being formed in an end portion on a first end side of the electronic pen main body unit in an axial direction of the electronic pen main body unit, a weight member; and an attachment portion that detachably attaches to the weight member, the attachment portion being formed in an end portion on a second end side of the electronic pen main body unit in the axial direction of the electronic pen main body unit.

Electronic pen

An image forming apparatus for forming a print image, which is composed of a first color image and a second color image, on a print medium, including: a test pattern printing portion that prints a test pattern including the first color and the second color; an image pickup portion that pictures an image of the test pattern printed by the test pattern printing portion; and a registration failure discrimination portion that discriminates a registration failure between the first color and the second color according to the pictured image of the test pattern pictured by the image pickup portion.

Growing community of inventors

Saitama, Japan

Hiroaki Shiokawa