香港生產力促進局

http://www.hkpc.org/

World Intellectual Property Organization

http://www.wipo.org/

創新科技署

http://www.info.gov.hk/itc/pag

Intellectual Property Department Hong Kong Government

http://info.gov.hk/ipd/

IBM Patent Server

http://www.ibm.com/patents/

Canadian Patent Index PATSCAN

http://www.library.ubc.ca/patscan/