The National Inventors Hall of Fame (NIHF) Museum is the National Monument to Innovation® that allows you to step into a world of inspiration, challenge and discovery. Visitors get to explores the stories and inventions of individual engineers and inventors who hold a U.S. patent of highly significant technology, through interactive exhibits. Located in the U.S. Patent and Trademark Office building at 600 Dulany Street, the museum was founded in 1973 and offers a gallery of digital portraits of the honorees, original artifacts and inspirational videos. There, you will discover the importance of trademarks and patents and how they make modern amenities possible. As of 2020, the National Inventors Hall of Fame has over 600 inductees who mostly constitute historic persons from the past three centuries but also include several living inductees. The most recent inductees are featured in a special display where visitors can see prototypes of their inventions and hear them discuss their inventive processes. The NIHF museum also promotes future generations of inventors by sponsoring various projects and ventures such as Invent Now Kids program, Camp Invention, and the Collegiate Inventors Competition. The National Inventors Hall of Fame is free and open to the public from Monday to Friday from 10 am to 5 pm and on Saturdays from 11 am to 3 pm.