Simplify the following text for a Grade 11 native English-speaking person.
Original: Between 1984 and 1987 , Mateschitz worked with TCBG Pharmaceutical ( a Blendax licensee ) to adapt Krating Daeng for the European market .
Simplified: Between 1984 and 1987 , Mateschitz worked with TC Pharmaceutical ( a Blendax licensee ) to adapt Krating Daeng for the European market .