Tips to inventors :
telling what inventions are needed, and how to perfect and develop new ideas in any lines /
by Robert Grimshaw.

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Main Author
Grimshaw, Robert, 1850-
Language(s)
English
Published
©1892
New York, New York The Practical Publishing Company
Subjects
Patents.
Inventions.
Physical Description
84 pages 18 cm
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Full view   University of Illinois at Urbana-Champaign