Hints to Inventors: Telling Them What Inventions Are Needed, And How To Perfect And Develop New Ideas In Any Lines

by: Robert Grimshaw Grimshaw ME · James Zimmerhoff Paperback details (USA). (see also: Leather Bound) ISBN: 978-1-5497-4877-6 ISBN-10: 1-5497-4877-7 Independently published · 2017