Google Patent Search tool is a good platform to search patents in U.S. This shows detail information about any search, this also shows images and other product releted information. This service is now in beta version.

Some more information from Google Patent Search portal reveals

All patents available through Google Patent Search come from the United States Patent and Trademark Office (USPTO). Patents issued in the United States are public domain government information, and images of the entire database of U.S. patents are readily available online via the USPTO website.

upto date, the USPTO has made available approximately 7 million patents and over a million patent applications

Google Patent Search covers the entire collection of issued patents and millions of patent application made available by the USPTO—from patents issued in the 1790s through those most recently issued in the past few months. We don’t currently include international patents, but we look forward to expanding our coverage in the future.

 

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