4 days Left[Technology] United States Patent Issued to a Pioneer in Sound Film, 1927Est. $800-$1,200$400Freeman'sPhiladelphia, PA
![[Technology] United States Patent Issued to a Pioneer in Sound Film, 1927: [Technology] United States Patent Issued to a Pioneer in Sound Film, 1927 (Washington, D.C.: United States Printing Office), 1927. Comprising eight sheets, three with printed text recto and verso, fiv](https://p1.liveauctioneers.com/197/420376/233883698_1_x.jpg?height=280&quality=70&sharpen=true&version=1780677787&width=280)
