Sensors for the determination of temperatures, positions and distances; Self-powered wireless radio transmission sensors; Battery-free sensors for detecting water leakage; Electric semiconductor converters; Solar batteries; Electrical cells and batteries; Personal digital assistants in the shape of a watch; Smartphones; Semiconductors; Semiconductor boards; Semiconductor board modules; Semiconductor devices; Integrated circuits; Large scale integrated circuits; Electron tubes; Electronic circuits, not including those recorded with computer programs; Radio communication machines and apparatus, namely, transmitter of electronic signals, radio-frequency transmitters