Foreign patent protection will enable you to prevent others from profiting from your idea in other countries.
Many countries will allow you to claim priority from your national application. If you apply for a national patent (or filed a utility model application), we recommend filing foreign patent applications within one year at the latest from the earliest relied on filing date of your national patent application (Paris Convention period). The proper foreign protection for your invention will depend upon your business plan.
Filing in foreign countries not only increases your patent protection but also increases the market value of your idea, particularly to companies that import and export their products. Furthermore, if you plan to be the exclusive source of the invention and intend to manufacture your product overseas, you should definitely want to file for patent protection in those countries.