A digest of patents /
issued by the United States, from 1790 to January 1, 1839: published by act of Congress, under the superintendence of the commissioner of patents, Henry L. Ellsworth. To which is added the present law relating to patents.
APA Citation
United States. Patent Office., Ellsworth, H. Leavitt. (1840). A digest of patents. Washington: Printed by P. Force.
MLA Citation
United States. Patent Office, and Henry Leavitt Ellsworth. A Digest of Patents. Washington: Printed by P. Force, 1840.
Warning: These citations may not always be complete (especially for serials).