Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,717 pages of information and 247,131 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
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[[Image:Im0231HVE-Ozo.jpg|thumb| February 1931. ]] | [[Image:Im0231HVE-Ozo.jpg|thumb| February 1931. ]] | ||
[[image:Im195210HVE-Ozonair.jpg |thumb| October 1952.]] | |||
of 96 Victoria Street, Westminster, London. | of 96 Victoria Street, Westminster, London. | ||
of 96 Victoria Street, Westminster, London.
1912 Apparatus for air purification.
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