Index of patents issued from the United States Patent and Trademark Office. 

 - Washington  The Office  For sale by the Supt. of Docs., U.S. G.P.O.  1974- 
 - v.  27 cm. 
 - 
 - Began with 1974. 
<br/><br/> For sale by the Superintendent of Docs., U.S. G.P.O.  Includes both printed and CD-ROM formats.  Vols. for <2001-> distributed to some depository libraries in DVD-ROM. 
<br/><br/><label>LCCN: </label>doc92000204  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Patents--Periodicals.--United States<br/>Trademarks--Periodicals.--United States
<br/><br/><label>GPO Item No.: </label>0255-A 
<br/><br/><label>Gov. Doc. Class. No.: </label>C 21.5/2: