Smart Parts are sueing Invert, apprently they thought up the idea of the air going thro the grip first.
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=4&f=G&l=50&co1=AND&d=PG01&s1="smart+parts".AS.&OS=AN/"smart+parts"&RS=AN/"smart+parts"
Who will they go after next
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=/netahtml/PTO/search-bool.html&r=4&f=G&l=50&co1=AND&d=PG01&s1="smart+parts".AS.&OS=AN/"smart+parts"&RS=AN/"smart+parts"
Who will they go after next