Gyro's First Invention was published by a company founded in what city?
Egmont Group The Egmont Group (formerly The Gutenberghus Group) is a Danish media corporation founded and rooted in Copenhagen, Denmark. The business area of Egmont has traditionally been magazine publishing but has over the years evolved to comprise mass media generally.
S G Brown Ltd S. G. Brown Ltd was established in 1903 by British engineer Sidney George Brown, to manufacture scientific instruments, its best known product was the gyroscopic compass.