The story
Avcon belonged to the Maréchal Electric group of companies, which has its primary corporate headquarters in France. Maréchal established the MELTRIC Corporation in 1981 to market products for North America; MELTRIC, in turn, registered the trademark for Avcon Corporation in 1995. The initial registered address for Avcon was in Cudahy, Wisconsin. The company ceased operation in 2007. On April 10, 2020, the United States Patent and Trademark Office [USPTO] invalidated the company’s trademark.
From Wikipedia’s article on Avcon, shared under CC BY-SA 4.0.3