Gadget or system canes by inventive spirits are perhaps the most fascinating and most collected canes. These quirky creations feature hidden devices such as a fan, an umbrella, a bottle and drinking glass, a perfume bottle or a sword. Sometimes also scalpels and syringes in canes for doctors. Also, musical instruments, fishing rods, telescopes, sewing kits and corkscrews can be hidden in the head of a cane. More than 1500 patents were applied for during the 18th and 19th centuries. The two essential properties of the gadget cane are something hidden and a combination of several tools or functions.