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.
Itâs difficult to find a bow that will give both a smooth broad sound and at the same time have great clarity of focus and the quickness of response that comes from a stronger, stiffer bow. Weight and Balance The average weight of a violin bow is about 60 grams (a viola bow is 70 grams; a cello bow, 80 grams). But remember, this is only an average.