400. That’s an error.

Google cannot redirect you to http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN/1328230 because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.