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Expired
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John Meiggs Ewen
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Individual
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Individual
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Publication of GB189716544ApublicationCriticalpatent/GB189716544A/en
16,544. Ewen, J. M. July 13. Windows; glazing. -Portions C of the prisms B are inclined in order to diffuse, or throw the light to the sides of the room.
GB189716544D1897-07-131897-07-13Window Prism Plates with Prisms Bent from the Straight Line.
ExpiredGB189716544A
(en)