Early unnumbered U.S. patents, 1790-1836
Subtitle: index and guide to the microfilm edition.
Contributors: United States. Patent Office.
Publisher: Research Publications
Published: 1980
Place of publication: Woodbridge, CT
Language: eng
Number of pages: 693
Subjects: Patents -- United States -- Indexes.
Other titles: Early unnumbered US patents, 1790-1836.