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Patents for Inventions, Fifty Years Subject Index 1861-1910: Classes 1-37

Great Britain. Patent Office

Published: 1915

Total Pages: 1026

Patents for Inventions, Fifty Years Subject Index 1861-1910: Classes 121-146

Great Britain. Patent Office

Published: 1913

Total Pages: 914

Patents for Inventions, Fifty Years Subject Index 1861-1910: Classes 38-70

Great Britain. Patent Office

Published: 1913

Total Pages: 1002

Patents for Inventions, Fifty Years Subject Index 1861-1910: Classes 98-120

Great Britain. Patent Office

Published: 1913

Total Pages: 1020

Patents for Inventions

Published: 1920

Total Pages: 1030

Patents for Inventions

Great Britain. Patent Office

Published: 1922

Total Pages: 634

Patents for Inventions. Abridgments of Specifications

Great Britain. Patent Office

Published: 1920

Total Pages: 1138

Patents for inventions

Published: 1932

Total Pages: 448

The National Union Catalog, Pre-1956 Imprints

Library of Congress

Published: 1972

Total Pages: 712

Chemical & Metallurgical Engineering

Published: 1921

Total Pages: 654