National Earmuff Day | March 13

On March 13, 1877, he was awarded a patent for his new creation. It was one of many would earn. Greenwood was a prolific inventor, but the invention he is most known for is the earmuff. For almost 60 years, Greenwood manufactured these ear protectors, which provided jobs for the people in the Farmington, Maine area. https://nationaldaycalendar.com/natio...