Product patents

Welcome to the Patent Information page for Merck & Co., Inc., Rahway, New Jersey USA (known as MSD everywhere except the United States and Canada). This site contains patent information about our products in the United States and the rest of the world. If you are interested in patent information regarding a US product, click the US site below.  If you are interested in patent information regarding a product outside of the US, click the ex-US site below.