Simplify the following text for a Grade 5 native English-speaking person.
Original: In April 2005 , palmOne purchased PalmSource 's share in the ` Palm ' trademark for US$ 30 million . In July 2005 , palmOne launched its new name and brand reverting back to Palm , Inc. and trading under the ticker symbol PALM once again .
Simplified: In 2004 , Palm changed their name to PalmOne , but later in 2005 they switched back to Palm , Inc.