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
from the U.S. Patent and Trademark Office.  Many PTDLs have on file
patents issued since 1790, trademarks published since 1872, and select
collections of foreign patents.  All PTDLs receive both the patent and
trademark sections of the Official Gazette of the U.S. Patent and
Trademark Office and numerical sets of patents in a variety of formats.
Patent and trademark search systems in the Cassis CD-ROM series are
available at all PTDLs to increase access to that information.  It is
through the CD-ROM systems and other depository materials that
preliminary patent and trademark searches may be conducted through the
numerically arranged collections.
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.
All information is available for use by the public free of charge.
However, there may be charges associated with the use of on-line
systems, photocopying and related services.
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

Partnership PTDLs provide enhanced and expanded services for which
fees are charged. They offer on-line patent text and image searching,
on-line trademark searching, and videoconferencing for examiner
interviews and workshops. They accept disclosure documents on site,
order file wrappers, assignment documents and certified copies for their
customers, and host a variety of seminars aimed at specific audiences,
including practitioners, paralegals, and independent inventors.
Currently, partnerships are located at the Great Lakes Patent and
Trademark Center (GLPTC) at the Detroit Public Library in Detroit,
Michigan and the Sunnyvale Center for Innovation, Invention and Ideas
(SCI3) in Sunnyvale, California.
State                   Name of Library                  Telephone Contact

Alabama                 Auburn University Libraries         (334) 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) 557-4500
                        Sunnyvale Center for Innovation, 
                        Invention and Ideas                 (408) 730-7290
Colorado                Denver Public Library               (303) 640-6220
Connecticut             Hartford Public Library                    Not Yet
                        New Haven Free Public Library              Not Yet
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
                        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                   (765) 494-2872
Iowa                    Des Moines: State Library of Iowa   (515) 281-4118
Kansas                  Wichita: Ablah Library, Wichita
                        State University                    (316) 978-3155
Kentucky                Louisville Free Public Library      (502) 574-1611
Louisiana               Baton Rouge: Troy H. Middleton
                        Library, Louisiana State University (504) 388-8875
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: Media Union Library,
                        University of Michigan              (313) 647-5735
                        Big Rapids: Abigail S. Timme
                        Library, Ferris State University    (616) 592-3602
                        Detroit: Great Lakes Patent and     (313) 833-3379
                        Trademark Center
Minnesota               Minneapolis Public Library and
                        Information Center                  (612) 630-6120
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) 784-6500
                                                                  Ext. 257
New Hampshire           Concord: New Hampshire
                        State Library                       (603) 271-2239
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) 592-7000
                        Stony Brook: Engineering Library,
                        State University of New York               Not Yet
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                    Akron - Summit County Public        (330) 643-9075
                        Cincinnati and Hamilton County,
                        Public Library of                   (513) 369-6971
                        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               (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) 865-4861
Puerto Rico             Mayaquez General Library,
                        University of Puerto Rico           (787) 832-4040
                                                                 Ext. 3459
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               Memphis & Shelby County Public
                        Library and Information Center      (901) 725-8877
                        Nashville: Stevenson Science
                        Library, Vanderbilt University      (615) 322-2717
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
                        Lubbock: Texas Tech University      (806) 742-2282         
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) 828-1104
Washington              Seattle: Engineering Library,
                        University of Washington            (206) 543-0740
West Virginia           Morgantown: Evansdale Library,
                        West Virginia University            (304) 293-2510
                                                                  Ext. 113
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