Patent ID: 7374085

Claim:
A cooperative buying system using a network comprising: a server connected to said network; a database, included in said server, for storing order sheet data for each buyer; means, connected to said network, for updating said order sheet data via said network; means for summing up the quantities of ordered products for each type of the ordered products included in the order sheet data of each buyer to obtain temporary aggregated data before a predetermined date is reached; means for providing said temporary aggregated data as order reception status data to be referred to by a product supplier in real time; means for inhibiting the updating of said order sheet data after said predetermined date; means for aggregating said order sheet data of each buyer by summing up the quantities of ordered products for each type of the ordered products to obtain aggregated data after said predetermined date; and means for fixing, as order data, said order sheet data for each buyer and said aggregated data after said predetermined date at a same time.