Google is now very excited about releasing the new beta version of Google Patent Search, this would make the search full text for U.S. patent corpus and to find patent those impresses you. You can now explore your self with www.google.com/patents.
You can by criteria, with patent number, inventor, and filing date. You could as well view images of original patents online.
Further Google says it’s a natural expansion of their mission to make public domain government information easily available to users using Google search technology. It has now been started with over 7 million patents granted by the U.S. patent and trademark office (USPTO) and also look forward to expanding our coverage over time.