A patent is an exclusive legal right of the owner of the same (patentee) which grants him/her the legal authority to prohibit others from making or using a patented invention. A provisional patent application is a brief synopsis disclosing the essence and nature of the invention, which is a kind of preliminary application that an inventor can file before filing the complete patent application. Even it explains the patent in brief; filing a provisional patent is very useful for the inventor as it locks the priority date and secures the invention, so that no one else can claim authority over it.