Does anybody know of any prior art related to US20110128257 ?
The patent US20110128257 claims a provisional application date of Nov 29 2009.
It seems that there is prior art at least for claims 1 and 2:
Collins, Ryan V. Methods and apparatus for receiving user input via time domain reflectometry. US-Patent 2004/0239616 A1
Furthermore, the general principle of touch sensing using TDR has already been described in 1964: