Predetermined-area management system, communication method, and computer program product
AssigneeRicoh Company, Ltd.
InventorsYoichi ITO, Toshiyuki Terashita, Noriyuki Terao, Yoshiaki Irino, Tomonori Tanaka, Nozomi Imae, Toru Harada, Hirokazu Takenaka, Hideaki Yamamoto, Kensuke Masuda, Satoshi Sawaguchi, Daisuke Bessho, Hiroyuki Satoh, Makoto Shohara
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