Method of manufacture of hollow mandrels for work on pipeline camps

The method of manufacturing hollow mandrels for work on pipeline camps: No. 24174. Supponent.03/30/1911.Issuance on 05/31/1913 / "Plants of Mannesmanovsky Pipes."- [B.M .: B. and., 1913].-[2] s .. -Description of the method of manufacturing hollow mandrels for working on pipe rolling mills.To the privilege of the company "Factories of the Mannesnovsky pipes" (Mannesmanrhren-Werke), in the city of Dusseldorf, in Germany, declared on March 30, 1911 (okhr. St. No. 47509).Class 7b.No. 24174. The privilege issued on May 31, 1913.Ex.: With a handle.litter..I. "Plants of the Mannesmanovsky pipes", company (Dusseldorf, Germany) .1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS