In 1951, International Telephone and Telegraph signed a cross-licensing agreement agreement with Western Electric (acting on behalf of itself and AT&T, its corporate parent), allowing them to use one another's patents. This was an extension of an earlier agreement they had, which was signed in 1925. Some people theorize that AT&T's willingness to enter this 1951 agreement may have been the result of the ongoing antitrust lawsuit they were facing at the time, which had been launched by the U.S. Justice Department in 1949.
In any case, one of the most important results of the 1951 agreement was that it set the stage for ITT to begin producing their own version of the Princess set. The ITT/Kellogg Cinderella began production in 1959???? SOMEONE CARE TO HELP ME FILL IN THE REST OF THIS STORY????
Although the cross-licensing agreement freed ITT from worry about patent infringement, the agreement did not include access to Western Electric's actual blueprints for the Princess design. So they ended up reverse-engineering the design from production samples of the Princess, and in 1959, they introduced their own model, named the "Cinderella" to the public.
The Cinderella was initially available in any color EXCEPT black.
With a stocking arrangement set up with Graybar, Kellogg soon dominated the Princess Independent telephone market. Graybar had stocking locations all over the country from which it could provide overnight delivery of Kellogg phones. Leich and North simply dropped by the wayside, and Stromberg Carlson, in order to survive, finaly decided to copy the Princess set, too.
By 1965, ITT dropped the storied Kellogg name altogether. That same year, they also discontinued the Cinderella. I HAVE NO IDEA WHY. CAN SOMEONE EXPLAIN?
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