Title:
児童・生徒、教職員、学校の安全管理システム
Document Type and Number:
Japanese Patent JP3109008
Kind Code:
U
Inventors:
Akio Futaba
Application Number:
JP2003273653U
Publication Date:
April 28, 2005
Filing Date:
December 16, 2003
Export Citation:
Assignee:
Century System Co., Ltd.
International Classes:
(IPC1-7): G08B25/04