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1	Title:	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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2	Title:	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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