Exhibitors displaying their inventions at the 41st International Exhibition of Inventions, New Techniques and Products, in Geneva, Switzerland, yesterday. Left: Chen Hsing-Feng of Taipei displays a weight-alert backpack which warns students if the load is too heavy and a luminous alert to protect them at night. Charging devices for mobile devices are included. RIGHT: Marie Adrienne Guide of France displays shoes with removable heels and interchangeable elements. They are divided into three multi-height parts and allow the height to be adjusted in one movement. They can also be personalised thanks to its interchangeable elements (bracelets).
