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.
Edison Manufacturing Company The Edison Manufacturing Company was a company organized in 1889 by the inventor and entrepreneur Thomas Edison that manufactured batteries, machinery and equipment, and also produced kinetoscope films. Its assets and operations were transferred to Thomas A. Edison, Inc. in 1911.