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Illustrated manual for inventors on American and foreign patents, etc (1880)

Hunter, Rudolph M. [from old catalog] · Philadelphia, Press of Burk & McFetridge · leaf 67

An illustration from Illustrated manual for inventors on American and foreign patents, etc, 1880, leaf 67 — RUDOLPH M. HUNTER, M. E.,C. E. 901 WALNUT STREET, PHILADELPHIA, PA. » ■ ♦-

Patents

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