Am improvements in ophthalmoscopes
By: [Arthur William Down]
Contributors: Down, Hubert Vincent, inventor; Ferrier, Richard Henry, inventor; Mozley-Stark, A., agent
Publisher: Printed for Her Majesty's Stationery Office by Darling and Son, Ltd
Place of publication: London
Language: eng
Notes: Patent specification.

Contains the complete specification.

Patent reference : 1892/5517.