Institution
- Nordic Ware1
- Norge1
- Northwestern Consolodated Milling Co., Minneapolis, Minnesota1
- Nusoy1
- Oak Farms1
- Occident Flour1
- Oleomargarine1
- Omega1
- Oriental1
- Parkay;Kraft Cheese Company1
- Parowax1
- Penick & Ford Ltd., Incorporated1
- Perfection Stove Company1
- Pet Milk Co.1
- Philadelphia Inter-State Dairy Council, Philadelphia, Pennsylvania1
- Piggly Wiggly Bird Co.1
- Pillsbury Food Products, Minneapolis, Minnesota1
- Plant Flour Mills Co., St. Louis, Missouri1
- Planters1
- Plymouth Rock, New York 1