Reference
Google Patentshttp://www.google.com/patents
via
ITmedia News：Googleが米国特許の検索サービス「Google Patent Search」公開http://www.itmedia.co.jp/news/articles/0612/14/news037.html
Google Patents - Google 特許検索
Reference
Google Patentshttp://www.google.com/patents
via
ITmedia News：Googleが米国特許の検索サービス「Google Patent Search」公開http://www.itmedia.co.jp/news/articles/0612/14/news037.html