It does not matter , because DFMI was later acquired by TMMI
The questions are :
1) Did DFMI acquire the codec from ISI ? or TMMI ?
1.a) If DFMI acquired the codec from ISI, when was it ? before TMMI acquired the worldwide exclusive right from ISI or after ?
1.b) If DFMI acquire the codec from TMMI, then when was it, before or after the TMMI acquired the worldwide exclusive right from ISI ?
2) Is there any official document which indicated that TMMI's exclusive right from ISI was canceled ? If it did, when was that ?
3) How did Dimension get its right of codec ? From DFMI ? or ISI ? and when was that ?