Index to iron and steel patents
By: by V. Everett Kinsey and Thomas E. Hopkins, American compilation company, Pittsburgh, Pa.
Contributors: Hopkins, Thomas Emil, 1910- joint author.; American compilation company, Pittsburgh.
Publisher: The Alton press, inc.
Published: 1930
Place of publication: Pittsburgh, Pa
Language: eng
Number of pages: 356
Subjects: Patents -- United States; Iron industry and trade -- United States; Steel industry and trade -- United States
Notes: Letter on cover: First edition.