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.
Bow: The bow of a viola is also sturdier and heavier, weighing from 69 to 74 grams, while the bow of a violin is about 60 grams. The frogs of their bows are also different: the frog of a viola bow is rounded but the one on a violin bow is pointed. (*A frog is the part of the bow that is held by the hand.