Where to Find Patents at the Connecticut State Library

Connecticut Invents!

Here you will find information for locating U.S. Patent information within the Connecticut State Library.

These are some selected resources. You may contact us with questions.

Connecticut Patents Project
A database of patents issued to residents of the state of Connecticut, ranging from 1800 through 1890.

Need more help? Try a patent depository library

Sacred Heart University Patent Library
PLEASE NOTE: As of June 30th (2018?) the PTRC at Sacred Heart University will be closed permanently! For more information contact the library https://library.sacredheart.edu/home.
Patent and Trademark Resource Centers (PTRCs)
Site Description: "A Patent and Trademark Resource Center (PTRC) is part of a nationwide network of public, state, and academic libraries designated by the USPTO to support the public with trademark and patent assistance."
Providence Patent and Trademark Resource Center
At the Providence Public Library Phone: 401-455-8027
more...less...
Link is broken - Library contacted twin Dec 2020 https://www.provlib.org/education/adults/small-business-workshop-series/
Boston Patent and Trademark Resource Center
At Boston Public Library Phone: 617-536-5400, Ext. 2226
UMass Amherst Patent and Trademark Resource Center
Science & Engineering Library at the University of Massachusetts at Amherst. Phone: 413-545-1370
New York Patent and Trademark Resource Center
New York Public Library's Science, Industry, and Business Library. Phone: 212-592-7000
Smithtown Patent and Trademark Resource Center
Smithtown Library (Long Island). Phone: 631-360-2480x128
New York State Library Patent and Trademark Resource Center
New York State Library. Phone: 518-474-5355

1790-Present: U.S. Patent and Trademark Office; Google Patent Search
1790-1860: United States Patents - SL Fed Doc C 21.23:Microfilm-vault
1845-1871 - Not complete, earlier years text only: Annual Report to Congress by the Commission of Patents - SL Fed Doc C 21.1/1: See also Serial Set.
1872-2002: Official Gazette - SL Fed Doc C 21.5:
1872-1898. 1949-1963: Official Gazette - SL Fed Doc Microfilm Vault C 21.5:
1994-Present: USAPAT: Facsimile images of U.S. Patents on CD-ROM (used with Patents BIB index) - SL Fed Doc C 21.31:

U.S. Patent & Trademark Office (USPTO)
The United States Patent and Trademark Office (USPTO) is the federal agency for granting U.S. patents and registering trademarks.
Google Patent Search
1790 to Present. Special Google search for patents

Description and Drawings of Patents Available at the Library or online

Patent Date	Title	Location
1790-Present	U.S. Patent Office
1790-Present	Google
1790-1860	United States Patents	SL Fed Doc C 21.23:Microfilm-vault
1845-1871Not complete, earlier years text only.	Annual Report to Congress by the Commission of Patents	SL Fed Doc C 21.1/1:Also in Serial Set
1872-2002	Official Gazette	SL Fed Doc C 21.5:
1872-1898,1949-1963	Official Gazette	SL Fed Doc C 21.5:Microfilm-vault
1994-Present	USAPat: Facsimilie images of U.S. Patents on CD-ROM(used with Patents BIB index)	SL Fed Doc C 21.31:

Indexes for Patents Available at or through the State Library

Patent Date	Title	Location
1790-1836	Early Unnumbered U.S. Patents, 1790-1836	SL GIS Ref T 223.D7 R47
1790-1836	List of Patents Granted by the U.S., 1790-1836 (1872)	SL Fed Doc Ref I 23.7:
1790-1873	Subject Matter Index of Patents of Inventions 1790-1873, 3 vols.	SL Fed Doc Ref I 23.7:
1790-1839	Digest of Patents Issued by the U.S. from 1790-Jan. 1, 1839 (P. Force 1840)	SpecColl T 223.V4 A2 1840
1789-1899	Digest of U.S. Automobile Patents, from 1789-July 1, 1899...1900	SL Stacks TL 820.A4 1900
1800-1890	Connecticut Patents Project	SL Conn Doc St292mus cpp
1839-1841	Digest of Patents issued by the U.S. from 1839-1841 (W. Greer 1842)	SpecColl T 223.V4 A2 1840
1872-Present	Index of Patents	SL Fed Doc C 21.5/2:
1971-Present	U.S. Patent Office
1790-Present	Google

Patent Depository Libraries

Location	Telephone Number
Providence Public Library	(401) 455 - 8027
Boston Public Library	(617) 536 - 5400 ext. 2226
W.E.B. Dubois Library, UMASS	413-545-2765
New York Public Library(Science, Industry and Business Library)	(212) 592 - 7000
Ryan-Matura Library at Sacred Heart University - CLOSED	203-365-4842

Author:

Nancy Peluso

Last updated date:

Saturday, September 17, 2011

Links updated September 2020; Feb 2024