1.
Patent It Yourself : Your Step-By-Step Guide to Filing at the U. S. Patent Office
by Pressman, Attorney, David
ISBN: 9781413320442
2.
Patent It Yourself: How to Patent Your Work in the U.S.
by David, Attorney Pressman
ISBN: 9780873370752
4.
Patent It Yourself: Your Step-by-step Guide to Filing at the U.s. Patent Office
by Pressman, David Attorney
ISBN: 9781413317329
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Patent It Yourself: Your Step-by-step Guide to Filing at the U.s. Patent Office
by Pressman, David, Attorney
ISBN: 9781413320459