SCIENTIFIC, OPTICAL, MEASURING, SIGNALLING, CHECKING / SURVEILLANCE, AND TEACHING APPARATUS AND INSTRUMENTS, NAMELY DIGITAL SENSORS OF PRINTED FRAMES AND PATTERNS, COMPUTER CURSOR CONTROL DEVICES, NAMELY, DIGITAL PENS, APPARATUS FOR RECORDING, TRANSMITTING, AND REPRODUCING SOUND OR IMAGES, NAMELY, DIGITAL VIDEO SCREENS, SHORT WAVE TRANSMITTERS AND SHORT WAVE RECEIVERS