Apple patents Google Cardboard in search of use for iPod - SlashGear
http://www.slashgear.com/apple-patents-google-cardboard-in-search-of-use-for-ipod-24394238/
Head-Mounted Display Apparatus for Retaining a Portable Electronic Device with Display
United States Patent Application: 0150198811
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1=20150198811.PGNR.&OS=DN/20150198811&RS=DN/20150198811