For an example of this: http://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer http://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer You file your trade

For an example of this: http://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer http://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer You file your trademark for a particular type of business - it does not give you the right to practice that business elsewhere. For example, McDonalds Hardware, a fairly popular Hardware business, does not have the right to open up a McDonalds FastFood restaurant.