Patents throughout the world
By: by Wm. Wallace White and Byfleet G. Ravenscroft.
Contributors: Ravenscroft, Byfleet Gwillym, 1890- joint author.
Publisher: Trade activities, inc.
Published: 1944
Place of publication: New York
Language: eng
Subjects: Patents
Notes: Loose-leaf.
On cover: 2d ed.