Improvements in or relating to photographic shutters
By: [Heinrich Ernemann]
Contributors: Boult, Alfred Julius, patentee; Boult, Wade & Kilburn
Publisher: Printed for His Majesty's Stationery Office by Love & Malcomson, Ltd
Place of publication: Redhill
Language: eng
Notes: Patent specification.

Contains the complete specification.

Patent reference : 1903/3191.