Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,859 pages of information and 230,109 images on early companies, their products and the people who designed and built them.
Mechanical Ventilation Specialists of 72-76 Duke Street, Liverpool.
1891 Released a catalogue of their warming and ventilating appliances. 
1901 Improved motor-controlling switch 
1910 Released a catalogue. 
1937 Warming, ventilating and drying specialists