I would like to know what the legallity is in using an icon or logo such as "disc" as seen on any type of CD, or the digital "D" such as on any 8mm. digital tape for a camcorder, another example would be the "DVD" logo that is on mainly every movie out on DVD. I have tried to find info on theses logos and the rights to use them, but have not been successful. I would like to use one of these in creating a trademark for my own creations that I will be selling. Thanks in advance.