Electric lamps and blur belonging to them, as well as methods for the preparation and isolation of metal incandescent conductors

Electric lamps and blur belonging to them, as well as methods for the preparation and isolation of metal incandescent conductors: No. 3070/31.Declared.06/22/1879.Issues 05/05/1884 / Thomas Alva Edison.- [St. Petersburg]: Type.Exped.Zagot.state.papers, 1884. -14 p., 1 l.Il .. -The privilege issued from the Department of Trade and Manufactory in 1884. Foreigner Thomas Alve Edison, on electric lamps and the openings belonging to them, as well as methods of preparing and isolating metal incandescent conductors.Before the text: 31.Ex.: With a handle.litter..I. Edison, Thomas Alva 1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS