Weingarten, Schurgin, Gagnebin & Hayes
Signal input sheet
 A signal input sheet having a cover film made of a soft material at its surface, its repetitive writing durability is improved to obtain a signal input sheet having a good feeling and writing condition, and a high durability. A hard film layer 18 harder than a sheet 10 and cover film 15 is set between the sheet 10 made of a soft material and the cover film 15 located at the upper side and slightly harder than the sheet. 
Toppan Moore Co., Ltd.
G Y
G06F Y10T
inventional additional
Youzou Yasuo Kiichiro Hiroshi
Nouno Kagami Ogawa Yamada