The United States patent protects your invention only in this country. If you want foreign patent protection you may have to file in foreign countries.
Normally you would need a license from the Commissioner of Patents and Trademarks to file for a patent in another country within six months of filing in this country. You should discuss the need for and advisability of filing in a foreign country with an patent attorney before doing so, as you may lose certain protections by doing so. As noted earlier, many foreign countries make all patent applications public upon filing, which may have some negative impacts in the United States.
Under treaties with most foreign countries, if you have filed a patent application in the U.S. it is possible to delay filing your application for a foreign patent for up to one year after the U.S. filing and still claim "priority" in the foreign country.
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