google 所提供的免費美國專利檢索

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訪客 (未確認)
訪客 的照片
google 所提供的免費美國專利檢索

google 所提供免費美國專利檢索
http://www.google.com/patents

Nick
Nick 的照片
google 所提供的免費美國專利檢索

資料的限制
Google Patent Search covers the entire collection of patents made available by the USPTO—from patents issued in the 1790s through those issued in the middle of 2006. We don’t currently include patent applications, international patents, or U.S. patents issued over the last few months, but we look forward to expanding our coverage in the future.

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