Foldup Keyboard is a patent for a folding or segmented keyboard aimed primarily at travelling musicians/composers.
It’s an interesting concept that is not yet in production. The website is calling for discussion and ideas for features and construction.
The main issues are how the folding or segmenting mechanism would work, so as to be durable, and maintain a realistic keyboard action.
There’s also talk about whether adding speakers, for example, cheapens the system.
This is an interesting concept in producing portable gear for musicians. Head over to the forums and have your say.