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William James Davy
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18,513. Davy, W. J. Aug. 15. Globes.-An ash-tray to be placed in the bottom of an arc-lamp globe consists of a disk a of mica in a cross-shaped frame b of metal.
GB190718513D1907-08-151907-08-15An Improved Ash Tray for Electric Arc Lamp Globes.
ExpiredGB190718513A
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