United Shoe Machinery Corporation

United Shoe Machinery Corporation (sometimes abbreviated USMC) was a U.S.-based manufacturer of various industrial machinery, particularly for the shoe manufacturing industry (so is the corporate name,) which at one time monopolized the American shoe machinery business, and an important federal government's defense contractor during the World War I, Interbellum years, World War II and the Cold war era, which developed and manufactured various land and aircraft armaments, as well as components for the military hardware made by other manufacturers. Founded in Beverly, Massachusetts, its corporate headquarters were eventually relocated to Boston, with key production facilities scattered around Massachusetts.

The corporation pioneered the development and production of a synthetic leather materials.

During the Interbellum era corporate Research Division designed and developed gun mounts, gun turrets, fire control equipment, automatic guns, automatic fuse setting, bomb release equipment, automatic conveying equipment, and automatic rocket projectors, as well as many other things of military interest.

...
Wikipedia