"Improvements in and relating to electrical vacuum switches" July 1961 GB 967737

(Relating to a way of using magnetic fields to move arc roots in vacuum interrupters to avoid problems of gross melting when switching currents over about 10,000 amp)

"Switch having arc stabilizing electrodes" August 1966 GB 389463A; US 3270172

(Relating to arrangement of an additional floating electrode to limit the range of excursion of arc roots in vacuum interruptersswitching high currents)

"Improvements relating to apparatus for analysing suspended particles" February 1970 GB 1,316,752; US 3692412 (Relating to development of a monitor for airborne fibres)

"Improvements in and relating to typesetting" Filed 19 August 1970 Complete filing 2 August 1971 GB 1 309 830 (Relating to a way to combine mutiple CRT displays to form a single image without evident joins)

"Improvements in or relating to display systems" Filed 10 June 1971 Complete filing 2 June 1972 GB 1 309 769 (with K E Sinton)