Optical disc of light. An early optical disc system existed in 1935, named . An early analog optical disc used for video recording was invented by David Paul Gregg in 1958 and patented in the US in 1961 and 1969. This form of optical disc was a very early form of the DVD (). It is of special interest that , filed 1989, issued 1990, generated royalty income for Pioneer Corporation's DVA until 2007 —then encompassing the CD, DVD, and Blu-ray systems. In the early 1960s, the Music Corporation of America bought Gregg's patents and his company, Gauss Electrophysics. American inventor James
Understanding What We've Grown to Be Be". On April 9, 2013 the album was reissued in a deluxe physical edition, featuring their three most recent singles 'Hope', 'The King of Silence',' and 'Let These Words Last Forever' as well as a DVD of tour footage, interviews and live performance segments. "Understanding What We've Grown to Be" was recorded during two sessions, the first being from February 16 through March 10, 2011, and the second being from May 16 through June 23, 2011. On June 22, the first single <nowiki>"Mis//Understanding"</nowiki> surfaced through Equal Vision' official YouTube channel. A day later, the title track was also released for