From the RIMM PR:

The wide scope of licensed applications using the MMP™ Portfolio design techniques continues to encourage global manufacturers of end user products to become MMP™ Portfolio licensees. More than 40 companies from the US, Europe, Japan, Korea and Taiwan have licensed the MMP™ Portfolio technologies, including many industry leaders such as Fujitsu, Hewlett Packard, Kenwood, Mattel, Nokia, Philips, Sony and Toshiba.

That would basically just leave Mastu/Panasonic/JVC... and my guess is, and has been, they have too 'licensed' the MMP