?Library of Congress Copyright Office
101 Independence Ave. SE, Washington, DC 20559, (202) 707-6850, <www.loc.gov>
? Patent and Trademark Depository Libraries
<www.uspto.gov/web/offices/ac/ido/ptdl/ptdlib_1.html>: Find the repository nearest you in this state-by-state list.
?US Patent and Trademark Office
2021 S. Clark Place, Crystal Plaza 3, Room 1A101, Arlington, VA 22202, (703) 305-4463, <www.uspto.gov>
? The Evolution of Useful Things by Henry Petroski (Vintage Books)
? A History of the Early Patent Offices: The Patent Office Pony by Kenneth W. Dobyns (Sergeant Kirkland’s)
? Patently Female by Ethlie Ann Vare and Greg Ptacek (John Wiley &, Sons)
? Peculiar Patents: A Collection of Unusual and Interesting Inventions from the Files of the U.S. Patent Office by Rick Feinberg (Citadel Press)
? American Society of Appraisers
<www.appraisers.org>: Search for an appraiser to evaluate your antique device or locate an ancestor’s invention.
<www.micropatent.com>: Paid subscribers can search this Web database of US patents since 1836.
? National Inventors Hall of Fame
<www.invent.org>: Look at inventors and inventions through the ages.
? Rothschild/Petersen Patent Model Museum
<www.patentmodel.org>: Get a taste of patent-model history and peek at some of the museum’s 4,000 patent models.
? Smithsonian Institution Patent Models
<www.smithsonianlegacies.si.edu/category. cfm?c3tegory=Patent%20Models>: You can peruse more early patent models here.
<www2.delphion.com>: Register free to access this online database of US and international patents.