Index to iron and steel patents
By: by V. Everett Kinsey and Thomas E. Hopkins.
Contributors: Hopkins, Thomas Emil, 1910- joint author.
Edition: 2d ed.
Publisher: American compilation company
Published: 1931
Place of publication: Pittsburgh, Pa
Language: eng
Number of pages: 349
Subjects: Patents -- United States; Iron industry and trade -- United States; Steel industry and trade -- United States
Notes: Blank pages for "Notes" ([2] at end)