Improved valve mechanism for regulating fluid pressure

An advanced valve mechanism for regulating fluid pressure: No. 3564/136.Declared.06/21/1883.Issuance on 12/13/1886 / George Westingauz ml.- [St. Petersburg]: Type.Exped.Zagot.state.papers, 1886. -4 p., 1 liter.Il .. -The privilege issued from the Department of Trade and Manufactory in 1886 to a foreigner George Westingauz to the youngest, an advanced valve mechanism for regulating fluid pressure.Before the text: 136.Ex.: With a handle.litter..I. Westingauz, George (younger) .1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS