Technograph and Telegraph
1963 Technograph Electronic Products was a leading maker of printed circuit boards; the printed circuit interests of Telegraph Condenser Co were merged with Technograph and the company renamed Technograph and Telegraph[1]; formed Pye Printed Motors of Cambridge, as JV with Pye Ltd[2]
Presumably later had a subsidiary Technograph Microcircuits
1984 The printed circuit board subsidiary was closed by RHP<ref>The Times, May 18, 1984</ref.