Improvements in the construction of suction valves for exhausting air from chambers in artificial palates for dental purposes
By: [John Louis Pigot Leman]
Contributors: Downing, George, 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 : 1888/10994.