Houston intellectual property lawyer J. Mike Amerson has sued his former firm, now known as Williams Morgan, alleging that it failed to pay him more than $550,000 in income he earned in 2013 before leaving the firm last November.

Amerson also alleges that the firm has improperly continued to use his name “for the value associated with it” on the firm’s website, in connection with attorneys’ U.S. Patent Office registrations and in other listings, including on the State Bar of Texas website.