Here are the ones in COMC's database:
1935 Gum, Inc. Mickey Mouse - R89
1938 Gum, Inc. Horrors of War - R69
1939 Gum, Inc. War News Pictures - R165
1939 Gum, Inc. World in Arms - Airplanes - R173
1939 Gum, Inc. World in Arms - Iron Calvary - R173
1939 Gum, Inc. World in Arms - Miscellaneous - R173
1939 Gum, Inc. World in Arms - Ships - R173 + some more subsets: Fortifications, etc.
1940-41 Gum Products, Inc. Zoom Airplane Pictures, Series 1 - R 177-1 [Base] - White
Must be a series 2: Orange?
1940-41 Gum Products, Inc. Zoom Airplane Pictures, Series 3 - [Base] - Yellow
1940-41 Gum Products, Inc. Zoom Airplane Pictures, Series 4 - [Base] - Red
https://www.comc.com/Cards,sc,=gum+inc,ot,p8,i100
You can keep going down the list and then search Bowman.