During the 1950-1967 run, What's My Line? had any sponsors.
Though it may be not complete, here's a list of those who sponsored at one time or another:
Jules Montenier, Inc. products (Stopette Deodorant, Poof!, Finesse Flowing Creme Shampoo)
Helene Curtis
Remington Rand
Florida Citrus
Kellogg's Cereals
Allstate Insurance
Mutual of Omaha Insurance
Sunbeam
Contac
Dentu-Creme
Py-Co-Pay
Polaroid Land Cameras
Aprege Perfume
Standard Brands (Blue Bonnet, Royal Gelatins & Pudding, Baby Ruth)
Geritol
Universal Electrical Appliances
Crest Toothpaste
Bayer Aspirin
Glade by Johnson Wax
Cue Toothpaste with Fluoraction
Supp-hose Stockings
Bufferin by Bristol-Myers
Rose Lotion Vel Liquid Dish Soap
Norelco Speedshaver
Ford Motor Company (Falcon, Mustang, Thunderbird)
Champion Spark Plugs
Fleischmann's Margarine
Corning - maker of Centura and Pyrex
Ben-Gay Penetrating Heat Lotion
Phillips Milk of Magnesia Tablets
Diet Delight Low Calorie Canned Fruit
Texaco Gasoline
Bravo Floor Wax by Johnson Wax
Kem-Glo Enamel by Sherwin Williams Paint
Westinghouse
Kleenex Designer Paper Towels by Kimberly-Clark
Polident Denture Tablets (Last sponsor of final show)
Pet'm daily liquid vitamin food supplement for pets
Nytol Sleep Aid Tablets
Pledge Furniture Polish by Johnson Wax
Prell Shampoo (Procter & Gamble)
Tegrin skin cream for psoriasis
Cope pain reliever for women's headaches
Institute of Life Insurance
Crisco Oil
The Bell Yellow Pages
Jif Peanut Butter
Maxwell House Coffee
Pronto Push-Button Foam Floor Cleaner from Johnson Wax
Shell No-Pest Strips
Coca-Cola
Hamilton Beach Scovill Electric Knife
Duncan Hines Cake Mix
Post Honeycomb Cereal