Go for it. <Control + F> for find. https://investorshub.advfn.com/boards/read_msg.aspx?message_id=150364883 or https://investorshub.advfn.com/boards/read_msg.aspx?message_id=149280598 or http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=0&f=S&l=50&TERM1=cbv&FIELD1=&co1=AND&TERM2=Hennenhoefer&FIELD2=&d=PTXT Open up patent link and hold down "Control" and hit "F" for find. Put in modifier "RF", with and without "Channel". May have to count manually unless can do some fancy searching.