| http://www.w3.org/ns/prov#value | - Patent US5937390 - On-line advertising system and its method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsWhen a user accesses an advertisement on an on-line advertising system from a user terminal on the Internet using a WWW browser, an advertisement including the toll-free telephone number of a store is sent to the user terminal.
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