Patents & Utility Models
Nearly 80% of the world's technical knowledge can be found in existing patent documents. Patent searching is not something done only before filing a patent application. Today, patent databases are also used to develop technical knowledge and to gather information about competitors. In addition to paid patent databases, there are many free databases in which patent searches can be carried out.
Some patent databases that can be used free of charge are listed below:
Turkish Patent and Trademark Office (TÜRKPATENT)
online.tpe.gov.tr
European Patent Office patent search site
tr.espacenet.com
WIPO patent search site
www.wipo.int/patentscope/search/en/search.jsf
US patent search site
www.uspto.gov/patents/process/search/
Google Patent Search
www.google.com/patents