The transmitter inclusion scheme for unprofitable telegraphs and telephone

The transmitter inclusion scheme for unprofitable telegraphs and telephone: No. 28780. Supponent.12/11/1913.Issues 09/30/1916 / "Marconi, a company of unprofitable telegraphs."- [B.M .: B. and., 1916].-[2] p., 1 l.Il .. -Description of the transmitter switching circuit for unprofitable telegraphs and telephone.To the privilege of the British company of the unprofitable telegraph of Marconi's Wireless Telegraph Company Limited), in London, declared December 11, 1913 (og. St. No. 61084).Class 21a.No. 28780. The privilege issued on September 30, 1916..I. "Marconi", a company of unprofitable telegraph with limited liability (London) .1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS