Patent Search Tool Online (IMAGE) Michigan Technological University Caption Searching inactive patents can be time-consuming, but will be much simpler with a free-to-use search engine developed by Michigan Tech engineers. Credit Michigan Tech, Yuenyong Nilsiam Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.