PCT route of filing enables an inventor to club all the applications to be filed in different countries and go through a single process. It is advantageous over foreign filing as in that case he/she has to follow different complex and cumbersome procedures in the opted countries, thus PCT makes the process simple, cost-effective and efficient (less time consuming). Through PCT one can file a patent in a no. of countries (in addition to USA). However, PCT system applies to filing and search, afterwards it forwards the applications to concerned countries and the concerned Patent Office entertain it.