BrainCo has developed a BMI (Brain-Machine Interface) headband that can be used to control robots, amongst other things.
At CES their BrainRobotics division was demonstrating their low-cost prosthetic hand (Fig. 1-2).
They also had a Sawyer robot arm that could be controlled by their BMI to grasp ping pong balls (Fig. 3-5).
Shanghai OYMotion Technoloies Co. Ltd.
They were demonstrating their robot hand and a gesture recognition system that uses an arm-band sensor to detect muscle motion.
Demo of gesture control with TV.
Zorpia Robot Co. Ltd
Their booth was empty but it looks like they are developing a bionic or prosthetic hand.
It’s not clear if their poster shows their actual product or a concept design.