Within two weeks, Miami International Holding Inc. and its subsidiaries (MIAX) have attained five victories before the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office.

The PTAB declared that five Nasdaq patents (U.S. Patent Nos. 6,618,707, 7,246,093, 7,921,051, 7,747,506, and 8,386,371), related to electronic securities trading systems, are invalid under…