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1Title:  Additional improvement patents, 1837-1861    
 Creator:  United States National Archives and Records Service. 
 Paulauskas, James A., 1929-
 Publication:  National Archives and Records Service, General Services Administration, Washington,1977. 
 Notes:  Includes indexes. 
 Call #:  Pam. U241 
 Extent:  vii, 22 p. ; 27 cm. 
 Subjects:  Patents -- United States | Patent extensions -- United States
 
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2Title:  The petition of Daniel Pettibone to the Senate and House of Representatives of the United States, for the renewal of his patent for welding cast steel to iron, in such a manner as to be applied to edge tools or other purposes where steel is required    
 Creator:  Pettibone, Daniel. 
 Publication:  Printed by Thomas Town, Philadelphia,1818. 
 Call #:  Pam. P268 
 Extent:  48 p. ; 23 cm. 
 Subjects:  Patent extensions -- United States | Steel -- Welding | Steel, Cast | Imprints, Early American To 1820
 
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