	     Reference Collections of U.S. Patents and Trademarks
     Available for Public Use in Patent and Trademark Depository Libraries

The following libraries, designated as Patent and Trademark Depository
Libraries (PTDLs), provide public access to patent and trademark 
information received from the United States Patent and Trademark Office
(USPTO). This information includes all issued patents, all registered 
trademarks, the Official Gazette of the U.S. Patent and Trademark Office, 
search tools such as the Cassis CD-ROM suite of products and supplemental 
information in a variety of formats including online, optical disc, 
microfilm and paper. Each PTDL also offers access to USPTO resources on 
the Internet and to PubWEST (Web based examiner search tool), a system 
used by patent examiners that is not available on the Internet.

Staff assistance and training is provided in the use of this information. 
All information is available free of charge. However, there may be charges 
associated with the use of photocopying and related services. Hours of 
service to the public vary, and anyone contemplating use of these 
collections at a particular library is urged to contact that library in 
advance about its services and hours to avoid inconvenience.
   
State      		Name of Library                  Telephone Contact

Alabama 		Auburn University Libraries         (334) 844-1737
      			Birmingham Public Library      	    (205) 226-3620
Alaska      		Anchorage: Z. J. Loussac Public
			Library  			    (907) 562-7323
Arkansas   		Little Rock: Arkansas State
			Library  			    (501) 682-2053
California   		Los Angeles Public Library          (213) 228-7220
      			Riverside: University of 	    
			California, Riverside Libraries	    (951) 827-3226
                        Sacramento: California State	    
    			Library				    (916) 654-0069
      			San Diego Public Library      	    (619) 236-5813
			San Francisco Public Library	    (415) 557-4500
      			Sunnyvale Public Library 	    (408) 730-7300
Colorado  		Denver Public Library         	    (720) 865-1711
Delaware   		Newark: University of Delaware
			Library  			    (302) 831-2965
Dist. of Columbia	Washington: Howard University
			Libraries 			    (202) 806-7252
Florida      		Fort Lauderdale: Broward County
         		Main Library            	    (954) 357-7444
      			Miami-Dade Public Library      	    (305) 375-2665
      			Orlando: University of Central
			Florida Libraries  		    (407) 823-2562
Georgia      		Atlanta: Price Gilbert Memorial
			Library, Georgia Institute
         		of Technology   		    (404) 894-1395
Hawaii      		Honolulu: Hawaii State Public
			Library System			    (808) 586-3477
Idaho      		Moscow: University of Idaho Library (208) 885-6235
Illinois   		Chicago Public Library         	    (312) 747-4450
      			Springfield: Illinois State Library (217) 782-5659
Indiana      		Indianapolis-Marion County Public
			Library            		    (317) 269-1741
     			West Lafayette Siegesmund
			Engineering Library,
         		Purdue University   		    (765) 494-2872
Iowa      		Des Moines: State Library of Iowa   (515) 242-6541
Kansas      		Wichita: Ablah Library, Wichita
			State University          	  1 (800) 572-8368
Kentucky   		Louisville Free Public Library      (502) 574-1611
Louisiana   		Baton Rouge: Troy H. Middleton
         		Library, Louisiana State University (225) 388-8875
Maine 			Orono: Raymond H. Fogler Library,
			University of Maine		    (207) 581-1678
Maryland		Baltimore: University of Baltimore 
			Law Library 			    (410) 837-4554
			College Park: Engineering and 
			Physical Sciences Library,
         		University of Maryland		    (301) 405-9157
Massachusetts   	Amherst: Physical Sciences Library,
         		University of Massachusetts   	    (413) 545-2765
      			Boston Public Library         	    (617) 536-5400
							         Ext. 4256
Michigan   		Ann Arbor: Media Union Library,
         		University of Michigan      	    (734) 647-5735
      			Big Rapids: Abigail S. Timme
         		Library, Ferris State University    (231) 592-3602
      			Detroit: Public Library             (313) 833-1450
Minnesota   		Minneapolis Public Library and
         		Information Center      	    (612) 630-6000
Mississippi   		Jackson: Mississippi Library
			Commission 			    (601) 961-4111
Missouri   		Kansas City: Linda Hall Library     (816) 363-4600
								  Ext. 724
      			St. Louis Public Library      	    (314) 241-2288
								  Ext. 390
Montana      		Butte: Montana College of Mineral
         		Science and Technology Library      (406) 496-4281
Nebraska   		Lincoln: Engineering Library,
			University of Nebraska-Lincoln      (402) 472-3411
Nevada      		Las Vegas--Clark County Library 
			District 		       	    (702) 507-3421
			Reno: University of Nevada, Reno
         		Library            		    (775) 784-6500
								  Ext. 257
New Jersey   		Newark Public Library         	    (973) 733-7779
      			Piscataway: Library of Science and
         		Medicine, Rutgers University   	    (732) 445-2895
New Mexico   		Albuquerque: University of
   			New Mexico General Library          (505) 277-4412
New York   		Albany: New York State Library      (518) 474-5355
      			Buffalo and Erie County Public
			Library  			    (716) 858-7101
			Rochester Public Library       	    (716) 428-8110
      			New York  Library
			(The Research Libraries)	    (212) 592-7000
			Stony Brook: Engineering Library,
   			State University of New York	    (631) 632-7148
North Carolina   	Charlotte			    (704) 687-2241
			Raleigh: D.H. Hill Library, North
         		Carolina State University   	    (919) 515-2935
North Dakota   		Grand Forks: Chester Fritz Library,
         		University of North Dakota   	    (701) 777-4888
Ohio      		Akron - Summit County Public        (330) 643-9075
			Library				    
			Cincinnati and Hamilton County,
			Public Library of		    (513) 369-6932
      			Cleveland Public Library      	    (216) 623-2870
      			Columbus: Ohio State University
         		Libraries         		    (614) 292-3022
			Dayton: Paul Laurence Dunbar
			Library, Wright State 
			University		       	    (937) 775-3521
      			Toledo/Lucas County Public Library  (419) 259-5209
Oklahoma   		Stillwater: Oklahoma State
			University Center for International
         		Trade Development  		    (405) 744-7086
Oregon      		Portland: Paul L. Boley Law Library, 
			Lewis & Clark College 		    (503) 768-6786
Pennsylvania   		Philadelphia, The Free Library of   (215) 686-5331
      			Pittsburgh, Carnegie Library of     (412) 622-3138
      			University Park: Pattee Library,
         		Pennsylvania State University       (814) 865-7617
Puerto Rico             Mayaquez General Library,
                        University of Puerto Rico           (787) 993-0000
							         Ext. 3244
			Bayamon, Learning Resources Center,
                        University of Puerto Rico      	    (787) 786-5225
Rhode Island   		Providence Public Library      	    (401) 455-8027
South Carolina		Clemson University Libraries        (864) 656-3024
South Dakota		Rapid City: Devereaux Library,
			South Dakota School of Mines and
			Technology			    (605) 394-1275
Tennessee   		Nashville: Stevenson Science
         		Library, Vanderbilt University      (615) 322-2717
Texas      		Austin: McKinney Engineering
         		Library, University of Texas at     
      			Austin 				    (512) 495-4500
			College Station: West Campus
         		Library, Texas A & M University	    (979) 845-2111
      			Dallas Public Library         	    (214) 670-1468
      			Houston: The Fondren Library, Rice
			University			    (713) 348-5483
			Lubbock: Texas Tech University	    (806) 742-2282    
			San Antonio Public Library          (210) 207-2500
Utah      		Salt Lake City: Marriott Library,
         		University of Utah      	    (801) 581-8394
Vermont			Burlington: Bailey/Howe Library, 
			University of Vermont               (802) 656-2542      
Virginia   		Richmond: James Branch Cabell
         		Library, Virginia Commonwealth
			University        		    (804) 828-1101
Washington   		Seattle: Engineering Library,
         		University of Washington   	    (206) 543-0740
West Virginia   	Morgantown: Evansdale Library,
         		West Virginia University      	    (304) 293-4695
							         Ext. 5113
Wisconsin   		Madison: Kurt F. Wendt Library,
         		University of Wisconsin Madison     (608) 262-6845
      			Milwaukee Public Library      	    (414) 286-3051
Wyoming			Cheyenne: Wyoming State	Library	    (307) 777-7281
