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Actions Print current page Print all pages Download current page Download all pages Refine	Results Archives Subject: Duplexing 5 Hits 1 Baker Collection: Papers of Sir William Henry Preece UK0108 NAEST 020 1872-1888 Remove from selection Add to selection On the Telegraphic Problems of double sending and quadruplex telegraphy UK0108 NAEST 032/04 n.d. Remove from selection Add to selection The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science UK0108 NAEST 039/2 1873-06 Remove from selection Add to selection Provisional specification for W H Preece's first patent UK0108 NAEST 053/001 1855 Remove from selection Add to selection A.l.s. to W H Preece from W Carpmael, patent agent UK0108 NAEST 053/002 1855-11-13 Remove from selection Add to selection 1

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