1940s personal care magazine ad.

In 1840, the J.B. Williams Company in Glastonbury,
Connecticut, manufactured soap under the name
Ivorine. Williams decided to focus on its shaving
soap and sold Ivorine to Procter & Gamble, which
later developed Ivory.

1800s

This celebration of one of the most iconic and delicious foods has
been taking place every year since the early part of the Roaring 20s.

The story goes that a teenager, Lionel Sternberger, who was working
in his father’s sandwich shop, The Rite Spot in Pasadena, California, 
just decided to put a slice of American cheese on a burger one day        
and found it to be tasty so he shared the idea with his dad who
liked it too. And, thus, the cheeseburger was born.

Although the idea was thought to be created in California in 1924,
the first actual sandwich to be marketed that was first called the
“cheeseburger” was at Kaelin’s restaurant in Louisville, Kentucky
in 1934. But the following year, in 1935, the term “cheeseburger”
was actually trademarked in another place, at the Humpty Dumpty
Drive-in in Denver, Colorado. It seems that people all over the U.S. 
have taken credit for the invention of the cheeseburger!