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1.
Information about Patents by Stewart, Walter G. ISBN: 9781373465306 List Price: $19.95
2.
Information about Patents by Stewart, Walter G. ISBN: 9781373465283 List Price: $9.95
3.
Information about Patents (Classic Reprint) by Stewart, Walter G. ISBN: 9780260756756 List Price: $24.70
4.
Information about Patents (Classic Reprint) by Stewart, Walter G. ISBN: 9780266778554 List Price: $7.97