In an existing or new client/server system environment in which a plurality of clients are connected on a network, a function of specifying (selecting) a desired article by a requester, a function of requesting an approver to approve purchase of the specified article, and a function of determining approval...http://www.google.fr/patents/US6763335?utm_source=gb-gplus-shareBrevet US6763335 - Purchase request apparatus and system
