 StrongMDI Screen Systems, Inc., a wholly owned subsidiary of Ballantyne Strong, Inc. NYSE American: BTN, and a leader in projection screen manufacturing and optical coating development for cinemas, commercial venues and amusement parks worldwide Strong MDI, is pleased to announce that it has returned to full production capacity in compliance with government directives and workplace sanitation protocols. StrongMDI Screen Systems is also known for the development of highly sophisticated coatings for projection surfaces. 