Pen with concealed number giving access to telephone operator

摘要

The pen (1) has a cylindrical body (2) containing an ink reservoir (3) with a tip (4) or nib, and incorporates a system (5) for rotating a roller (6) so that a general message or a unique message appears in a window (7). The unique message can be a code number or personal number giving access to a telephone operator when dialled. In a vaiant of the design the roller can be replaced by a screen with an electronic circuit operated by a push-button on the pen.