An Innovation Leader
Gentex is an industry leader in developing products in the automotive, fire protection, and aerospace industries. Our entrepreneurial spirit leads us to continuously improve our existing products and look for new products and markets to grow our business. In an effort to protect our investments, we file significant numbers of U.S. and foreign patents. We have provided this section on our website to assist others in determining which Gentex patents cover a specific product.
For your reference, the tool below will display the United States patents that cover a specific interior rearview mirror when the lot number (located on the back of the mirror) is entered into the box below.
If your search returns a result of HMLK3 or HMLK4, click on those links for a list of all applicable HomeLink patents covering your specific product.
Please note that this tool works for all mirrors manufactured beginning June 2012. For all mirrors manufactured before that date, the patent information can be found on a label located inside the mirror's housing.