Improvements in the bridges of pince-nez or double eyeglasses
By: [Frederick Alexander Dyas]
Contributors: W. R. M. Thomson & Co
Publisher: Printed for Her Majesty's Stationery Office by Darling and Son, Ltd
Place of publication: London
Language: eng
Notes: Patent specification.

Contains both the provisional and the complete specification.

Patent reference : 1893/10371.