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Actions Print current page Print all pages Download current page Download all pages Refine	Results Archives Subject: Cathodes 2 Hits 1 'Cathodes' and 'Megawatt Valve Progress Notes' UK0108 NAEST 061/C/16 1943-1944 Remove from selection Add to selection 'Improvements in or relating to emissive cathodes' (Barium Zirconate Cathode) by Siemens Electric Lamps and Supplies Ltd Patent Application No. 29623/51 UK0108 SC MSS 135/C/30 1951 Remove from selection Add to selection 1

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