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 main frame of the cello is made from wood. Cellos are normally constructed with a spruce top. The back, sides, and neck are usually made of maple. Other wood are sometimes used for the back and/or sides, usually poplar or pine. The top and back are traditionally hand carved.