The U.S. Patent and Trademark Office (USPTO) has specially designated
over 80 libraries throughout the U.S. as Patent and Trademark Depository
Libraries (PTDL). Three of these libraries are further designated as
"PTDL Partnership" Libraries
PTDL Partnership Libraries are open to the public and provide specialized
services for people seeking patent and trademark information beyond
those provided by other PTDL libraries. These services may require a
fee, but include services and resources available otherwise only at
the Patent and Trademark Office in Washington, D.C.
Disclaimer: The Patent Search Information site is the
work of an information specialist with over 25 years of experience and
strives to be as accurate and useful as possible. However, no information
from this site should be construed in any way as providing legal advice.
Consult an attorney if you need legal advice.