	     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), receive patent and trademark information in various
formats from the U.S. Patent and Trademark Office. Many PTDLs have on
file all full-text patents issued since 1790, trademarks published since
1872, and select collections of foreign patents. All PTDLs have both the
patent and trademark sections of the Official Gazette of the U.S. Patent
and Trademark Office. The full-text utility and design patents are
distributed numerically on 16 mm microfilm, and plant patents on color
microfiche. Patent and trademark search systems on CD-ROM
(Compact Disc-Read Only) format are available at all PTDLs to
increase utilization of and enhance access to the information found
in patents and trademarks. It is through the CD-ROM systems
that preliminary patent and trademark searches can be conducted
through the numerically arranged collections.

All information is available for use by the public free of charge.

In addition, each PTDL offers reference publications which outline
and provide access to the patent and trademark classification systems, as
well as other documents and publications which supplement the basic search
tools. PTDLs provide technical staff assistance in using all materials.
Facilities for making paper copies of patent and trademark information are
generally provided for a fee.

Since there are variations in the scope of patent and trademark
collections among the PTDLs, and their hours of service to the public
vary, anyone contemplating use of these collections at a particular
library is urged to contact that library in advance about its
collections, services, and hours in order to avert possible
inconvenience.


State      		Name of Library                  Telephone Contact

Alabama 		Auburn University Libraries         (205) 844-1747
      			Birmingham Public Library      	    (205) 226-3620
Alaska      		Anchorage: Z.J. Loussac Public
			Library  			    (907) 562-7323
Arizona      		Tempe: Noble Library, Arizona
			State University         	    (602) 965-7010
Arkansas   		Little Rock: Arkansas State
			Library  			    (501) 682-2053
California   		Los Angeles Public Library          (213) 228-7220
      			Sacramento: California State
    			Library				    (916) 654-0069
      			San Diego Public Library      	    (619) 236-5813
			San Francisco Public Library	    (415) 557-4488
      			Sunnyvale Patent Clearinghouse      (408) 730-7290
Colorado  		Denver Public Library         	    (303) 640-6249
Connecticut   		New Haven: Science Park Library     (203) 786-5447
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            	    (305) 357-7444
      			Miami-Dade Public Library      	    (305) 375-2665
      			Orlando: University of Central
			Florida Libraries  		    (407) 823-2562
         		Tampa Campus Library, University
         		of South Florida       		    (813) 974-2726
Georgia      		Atlanta: Price Gilbert Memorial
			Library, Georgia Institute
         		of Technology   		    (404) 894-4508
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   		    (317) 494-2873
Iowa      		Des Moines: State Library of Iowa   (515) 281-4118
Kansas      		Wichita: Ablah Library, Wichita
			State University          	    (316) 689-3155
Kentucky   		Louisville Free Public Library      (502) 574-1611
Louisiana   		Baton Rouge: Troy H. Middleton
         		Library, Louisiana State University (504) 388-2570
Maine 			Orono: Raymond H. Fogler Library,
			University of Maine		    (207) 581-1678
Maryland   		College Park: Engineering and 
			Physical Sciences Library,
         		University of Maryland		    (301) 405-9157
Massachusetts   	Amherst: Physical Sciences Library,
         		University of Massachusetts   	    (413) 545-1370
      			Boston Public Library         	    (617) 536-5400
							          Ext. 265
Michigan   		Ann Arbor: Engineering Library,
         		University of Michigan      	    (313) 764-5298
      			Big Rapids: Abigail S. Timme
         		Library, Ferris State University    (616) 592-3602
      			Detroit Public Library         	    (313) 833-1450
Minnesota   		Minneapolis Public Library and
         		Information Center      	    (612) 372-6570
Mississippi   		Jackson: Mississippi Library
			Commission 			    (601) 359-1036
Missouri   		Kansas City: Linda Hall Library     (816) 363-4600
      			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      		Reno: University of Nevada, Reno
         		Library            		    (702) 784-6579
New Hampshire   	Durham: University of New
         		Hampshire Library          	    (603) 862-1777
New Jersey   		Newark Public Library         	    (201) 733-7782
      			Piscataway: Library of Science and
         		Medicine, Rutgers University   	    (908) 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
      			New York Public Library
			(The Research Libraries)	    (212) 930-0917
North Carolina   	Raleigh: D.H. Hill Library, North
         		Carolina State University   	    (919) 515-3280
North Dakota   		Grand Forks: Chester Fritz Library,
         		University of North Dakota   	    (701) 777-4888
Ohio      		Cincinnati and Hamilton County,
			Public Library of		    (513) 369-6936
      			Cleveland Public Library      	    (216) 623-2870
      			Columbus: Ohio State University
         		Libraries         		    (614) 292-6175
      			Toledo/Lucas County Public Library  (419) 259-5212
Oklahoma   		Stillwater: Oklahoma State
			University Center for International
         		Trade Development  		    (405) 744-7086
Oregon      		Portland: Paul L. Boley Law Library, 
			Lewis & Clark College 		           Not Yet
							       Operational
			Salem: Oregon State Library         (503) 378-4239
Pennsylvania   		Philadelphia, The Free Library of   (215) 686-5331
      			Pittsburgh, Carnegie Library of     (412) 622-3138
      			University Park: Pattee Library,
         		Pennsylvania State University       (814) 865-4861
Puerto Rico             Mayaquez General Library,
                        University of Puerto Rico                  Not Yet
                                                               Operational
Rhode Island   		Providence Public Library      	    (401) 455-8027
South Carolina		Clemson University Libraries        (803) 656-3024
South Dakota		Rapid City: Devereaux Library,
			South Dakota School of Mines and
			Technology			    (605) 394-6822
Tennessee   		Memphis & Shelby County Public
         		Library and Information Center      (901) 725-8877
      			Nashville: Stevenson Science
         		Library, Vanderbilt University      (615) 322-2775
Texas      		Austin: McKinney Engineering
         		Library, University of Texas at     
      			Austin 				    (512) 495-4500
			College Station: Sterling
         		C. Evans Library, Texas A & M
			University   			    (409) 845-3826
      			Dallas Public Library         	    (214) 670-1468
      			Houston: The Fondren Library, Rice
			University			    (713) 527-8101
								 Ext. 2587
Utah      		Salt Lake City: Marriott Library,
         		University of Utah      	    (801) 581-8394
Virginia   		Richmond: James Branch Cabell
         		Library, Virginia Commonwealth
			University        		    (804) 828-1104
Washington   		Seattle: Engineering Library,
         		University of Washington   	    (206) 543-0740
West Virginia   	Morgantown: Evansdale Library,
         		West Virginia University      	    (304) 293-2510
Wisconsin   		Madison: Kurt F. Wendt Library,
         		University of Wisconsin Madison     (608) 262-6845
      			Milwaukee Public Library      	    (414) 286-3051
Wyoming			Casper: Natrona County Public
			Library				    (307) 237-4935

