slide 2 of 6. When most people ask 'how long does a patent last', they are inquiring about utility patents. A utility patent is the patent granted for new machines, processes, products, and scientific formulas such as medicines or new elemental compounds.
The Stick. The largest part of the violin bow is the stick,with the best ones made of Pernambuco wood from Northeast Brazil, although carbon fiber is another quality choice.he Hair. The hair is the part of the violin bow that touches the strings and produces sound. Horse-hair is the traditional favorite, but synthetic hairs are also used for cheaper bows.
The modern takedown bow consists of the central handle or riser with mounting brackets top and bottom to attach the limbs. In the earlier versions, the riser was made of wood. Today, archery risers are made from a variety of metals and carbon composites. Similarly, the archery limbs attached to the archery riser make use of high tech composite materials which are better able to take the strain of a drawn archery bow and repeatedly deliver accurate shots without failing.