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Therapeutic inhaler, London, England, 1935-1942
'Elektro Pneumostat' therapeutic inhaler for the treatment of respiratory complaints, made by PAG, Germany, distributed by Francis Riddell, London, 1935-1942
'Oxypathor', oxygen absorption machine, Canada, 1911-1915
"Oxypathor", a quack device for increasing the body's absorbtion of oxygen, Canadian, 1910-1920
Wigmore sphygmomanometer by Allen and Hanburys
Wigmore sphygmomanometer by Allen and Hanburys, 48 Wigmore Street, London, W1, England, 1915-1925.