Improvement in the device of electric lamps

Improvements in the device of electric lamps: No. 2607/107.Declared.11/20/1879.Issue 09.11.1881 / Thomas Alva Edison.- [St. Petersburg]: Type.Exped.Zagot.state.papers, 1881. -4 p., 1 l.Il .. -The privilege issued from the Department of Trade and Manufactory in 1881. Foreigner Thomas Alve Edison for improvement in the device of electric lamps.Before the text: 107.Ex.: With a handle.litter..I. Edison, Thomas Alve. 1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS