Who was the inventor of Orange Julius, My father told me he was the
inventor of it and sold it in St. Louis, Mo. I was there and watched a
big promotion he kicked off in the late 50's in downtown St. Louis.
Several  years later he sold it out to a company that then established
the product name  Orange Julius which showed up in Malls all over St.
Louis. I'm not sure this is all true but sure remember my Dad's big
promotion in his florist
store that half of it was remodeled a soda fountain equipped with
blenders atleast and 25 seats in a soda fountain setup where he sold
this powder type drink which was blended with fresh orange juice, ice
and some water. He sold this for 10 cents a cup. He typically sold
100's of this blended drink each day in a cone shaped dixie cup for 10
cents a cup in the late 50's. I know what I saw is true, if you could
please solve this mystery.

Hello.

The Orange Julius was invented in the 1920s in Los Angeles,
California. A man named Julius Freed operated a business that
initially sold plain orange juice. Later, Freed's friend Bill Hamlin,
a real estate agent with a background in chemistry, developed the
famous Orange Julius recipe. Thus, Bill Hamlin is credited with
inventing the Orange Julius in the 1920s.

For more information, visit the web site of Orange Julius:
http://www.orangejulius.com/about/abo_history.asp

Also see this description from the book "Top Secret Recipes," as
quoted on Epicurious.com:

"In 1926 a man named Julius Freed opened a fresh-orange-juice shop in
downtown Los Angeles, initially ringing up sales of $20 a day. The
real estate agent who helped locate his first store just so happened
to be an ex-chemist named Bill Hamlin. The two became good friends. 
One day Hamlin, drawing on his chemistry background, presented Freed
with an idea for a compound, using all natural ingredients, that would
give his orange juice a creamy, frothy texture. When the two began
selling the new drink, response was so tremendous that sales
skyrocketed to $100 a day. An increasing number of customers would
come by the store saying, "Give me an orange, Julius," and so the name
was born.  By 1929 the chain had opened 100 stores across the United
States."
From "Top Secret Recipes" by Todd Wilbur, quoted on Epicurious.com:
http://food4.epicurious.com/HyperNews/get/archive_swap23001-23100/23058.html

According to Entrepreneur.com, Hamlin "quit his job in real estate and
focused on opening Orange Julius stores across the United States.
Within three years he had opened 100 stores and the profits for the
system, whose only product was a 10-cent drink, approached $3
million."
http://www.entrepreneur.com/franzone/details/0,5885,12-12---282654-,00.html

Perhaps your father was an early owner of an Orange Julius franchise.
Orange Julius was such a success that the company began selling
franchises in 1948, according to Entrepreneur.com.  An Orange Julius
franchisee would have been permitted to sell the drink in the way that
your father did in the 1950s.

search strategy: orange julius inventor, julius freed, bill hamlin

I hope this helps.