Author: [ Patents ]
Title: Patents For Inventions - Abridgements To Specifications - Class 82 (ii) Washing Granular, Powdered And Like Materials And Amalgamating, Cleaning, Coating And Granulating Metals. Period 1909 - 1915 [with] Period 1916 - 1920 [ 100001 - 155800 ] [with] Period 1921 - 1925 [ 155801 - 244800 ] [with] Period 1926 - 1930 [ 244801 - 340200 ]
Description: HMSO - Patent Office, 1921 - 1933, 1st edition. Cloth, F. xiv+172+[4]+x+82+[4]+xii+130+[4]+xiv+142+8pp, 4 volumes in 1, many hundreds of b/w illustrations, a nice fine copy. Hardback , no dustjacket. ¶ Brief outlines of all the UK patents passed in the years 1916 - 1930 relating to washing & granulating machines used in the mining & ore processing industries.

Keywords: patents, mining, industry, metals, inventions, engineering