Brown, President of the New York Central Railroad, and Marvin Hughitt, President of the Chicago & North western Railroad. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Marvin's safe was globeshaped, to present no salient points for the action of tools, made of chrome steel, mounted in this shape on a platform, or enclosed in a fire-proof safe. 威廉·亨利·杜利特.世纪发明.
Hall and Marvin of the United States also invented safes for the same purpose. 威廉·亨利·杜利特.世纪发明.