Best web sites to view and download patents:

1, Google Patents: Full text

http://www.google.com/patents?vid=USPAT6384020

2, PDF: FreePatentsOnline.com

http://freepatentsonline.com/6384020.pdf

3, USPTO, Full text:

http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=6384020

4, USPTO Patent Application Information Retrieval (PAIR): http://portal.uspto.gov/external/portal/home

5, If you know Perl, there is a module for downloading patent from USPTO:

WWW::Patent::Page

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