Loyd patent Loyd’s American Stereoscope Mascher Stereoscopic Book Mascher viewing case Metropolitan Syndicate Press Motoscope Pan-Chro Scope Pattberg Brothers Perfecscope Perry patent Plumber’s Nightmare Richmond/Stern patent Roche patent Sibley patent Stereo-Gothard Stereo-graphoscope (White) Stereoscope for the Million Stereoscopic Book Lorgnette Stereoscopic History Stereoscopic Medallion Stull viewing case Sun Sculpture Voyage to Europe Whiting View Company Whitner patent World’s Wonder