John H. Blease
John Henry Blease (1906 - 1985) British inventor and anaesthetic technician. Blease-Manley ventilator; the Alfo-Blease anaesthetic machine
Tag Blease-Manley ventilator
Roger Manley
Roger Edward Wentworth Manley (1930-1991) was a British inventor, anaesthetist and engineer. Pioneer of the Manley Ventilator and Multivent