What was the name of the company that developed the valved trumped in the Th century?

The company that developed the valved Trumpet in the 19th century was known as the "Besson" company, founded by the French instrument maker Gustave Besson. The valved trumpet gained popularity during this time due to its enhanced range and versatility. While other makers contributed to its development, Besson is often credited with significant advancements in brass instrument design.