Toshiba is most likely the global ultrasound manufacturer who did not wish to be named in the April 25, 2012 news release. It is referred to as "an non exclusive partnership" so unless the terms have changed, they will be free to partner with other manufacturers.

http://www.marketwire.com/press-release/ventripoint-signs-joint-development-agreement-with-brand-name-global-ultrasound-manufacturer-tsx-venture-vpt-1648402.htm