Additional improvement patents, 1837-1861 /

Bibliographic Details
Corporate Author:	United States. National Archives and Records Service
Other Authors:	Paulauskas, James A., 1929-
Format:	Government Document Book
Language:	English
Published:	Washington : National Archives and Records Service, General Services Administration, 1977.
Series:	Special list (United States. National Archives and Records Service) ; no. 39.
Subjects:	Patents > United States. Patent extensions > United States.

Description
Item Description:	Includes indexes.
Physical Description:	vii, 22 pages ; 27 cm.