T9 patented while QWERTY is not?
- by Marco W.
I've seen that there are lots of custom keyboards for Android, but all are QWERTY keyboards. I couldn't find any keyboard with T9 layout.
Is this because T9 is patented and the QWERTY layout is not? So if I made a T9 keyboard, I would have to pay patent fees?
So what does the patent protect when you look at T9? Only the layout? Or the prediction…