Among the recommended sites to learn about existing State of the Art prior to protection for our invention, we would like to highlight the following :
IPR-Helpdesk (European Commission)
Pricewaterhousecoopers Intellectual Property Exchange
World Intellectual Property Organization-WIPO
National Center for Biotechnology Information
However, if what you need is information about specific businesses or even about businesses interested in specific technologies, you can consult the following sources for information: