TY - CHAP A1 - Maye, Oliver A1 - Schäffner, J. A1 - Maaser, Michael T1 - An Optical Indoor Positioning System for the Mass Market Y1 - 2006 ER - TY - PAT A1 - Maye, Oliver A1 - Maaser, Michael A1 - Schäffner, J. T1 - Optischer Translations-Rotations-Sensor Y1 - 2006 ER - TY - PAT A1 - Maye, Oliver A1 - Maaser, Michael A1 - Schäffner, J. T1 - Stromloser Stand-By Y1 - 2007 ER -