Upphovsman
Pan-American Exposition Buffalo, N.Y.
4
Pan-American Exposition
2
Australian Clay Products Association
1
Dansk ingeniørforening
1
Industrial & Scientific Research Association (Madras, India)
1
Ingeniør-sammenslutningen
1
Southern Plastic Industries Association (Madras, India)
1
Verband Deutscher Schuhwarenhändler
1
Zhongguo gong cheng xue hui
1