https://www.turkpatent.gov.tr/TURKPATENT/
https://www.epo.org/index.html
https://www.uspto.gov/
http://english.sipo.gov.cn/
https://patents.google.com/advanced
https://online.turkpatent.gov.tr/trademark-search/pub/trademark_search;jsessionid=D1C5952B70337A6CF8F86E031A18F8AF