The patent application for the new electric/acoustic guitar has been published by the U.S. Patent and Trademark Office. It can be found at:
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=20160027422.PGNR.&OS=DN/20160027422&RS=DN/20160027422
Here is a PDF of the first page: patent appl page 1
This has been built as the fourth prototype. A second design, shown below, is modified from the second and fourth prototypes and will be the basis of the fifth prototype, much lighter than the fourth:
