Inventor

SUGIYAMA SHOICHI

JP3 patents

Patents

3 patents

US5188881AFeb 23, 1993

Thermosensitive stencil paper

RICOH KK13 citations72

US6569590B2May 27, 2003

Master batch pigment, toner including the master batch pigment and method for manufacturing the toner

RICOH KK6 citations70

US5219637AJun 15, 1993

Thermosensitive stencil paper

RICOH KK2 citations61