High valuation aside, it's important to remember that Tesla isn't just trying to displace GM. They're trying to displace GE.

Here's links to a few of the patents in question:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5747282.PN.&OS=PN/5747282&RS=PN/5747282
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5837492.PN.&OS=PN/5837492&RS=PN/5837492
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5693473.PN.&OS=PN/5693473&RS=PN/5693473
And here's the Federal Appeals Court case, which lists the rest of the patents:
http://www.bloomberglaw.com/public/document/Assn_for_Molecular_Pathology_v_US_Patent__Trademark_Office_653_F3

And here are links to the patents in question:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5748177.PN.&OS=PN/5748177&RS=PN/5748177
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5920303.PN.&OS=PN/5920303&RS=PN/5920303