I don't know the differences but here is the Patent http://patft.uspto.gov/netac... | Hacker News

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ry0ohki on May 16, 2011 | parent | context | favorite | on: Poll: Do you support software patents?

I don't know the differences but here is the Patent http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sec...

nitrogen on May 16, 2011 [–]

The patent number starting with a D indicates a design patent.

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