The Griswold Signal Company was an American company focused on railway signalling, based in Minneapolis, Minnesota. Founded by Minnesota native Franklin Wolcott Griswold, the company manufactured traffic signals and railroad level crossing signals.
The Griswold Signal Company was an American company focused on railway signalling, based in Minneapolis, Minnesota. Founded by Minnesota native Franklin Wolcott Griswold, the company manufactured traffic signals and railroad level crossing signals. (en)
The Griswold Signal Company was an American company focused on railway signalling, based in Minneapolis, Minnesota. Founded by Minnesota native Franklin Wolcott Griswold, the company manufactured traffic signals and railroad level crossing signals. (en)