Patent is an exclusive legal right of any inventor that grants him the legal authority to prohibit others from making or using a particular invention. A provisional patent registration is the first step towards filing a patent. A provisional application is a brief synopsis disclosing the essence or the nature of the invention. It is the preliminary application which can be filed before filing the complete specification. It explains the patent in brief but not completely. Filing a provisional patent is very useful for inventors as it locks the priority date and secures the invention so that no one else can copy it or claim authority over it.