A digest of patents, issued by the United States, from 1790 to January 1, 1939 : published by Act of Congress under the superintendence of the Commission of Parents, Henry L. Ellsworth to which is added the present laws relating to patents.
Contributors: Ellsworth, Henry Leavitt, 1791-1858.
Publisher: Printed by Peter Force
Published: 1840
Place of publication: Washington, D.C
Subjects: Patents -- United States.; Patent laws and legislation.