dimelives1
Don't forget this one...
http://bit.ly/byxmsG
 
 
 
 

One cannot copyright or trademark a title.  We could all write films and songs and books called X2.  Trademarking must be done by category.  My band is trademarked, but there is an infrared microscope with the same name.  Not a problem.

Bell had first dibs on the name:
 

 
 

I'm not 100% sure about trademark law but I know that the strongest trademarks are unique words that don't describe the product. Xerox and Kodak are great examples. They're so unique that it doesn't matter what industry you're in, you couldn't use those words. They're referred to as "fanciful marks." Someone naming their business Kodak Plumbing would quickly find themselves at the wrong end of a lawsuit. 
 
Arbitrary marks are those trademarks which use common words but which don't have anything to do with the product, which is why Apple is able to trademark the word Apple. If they were selling apples, they wouldn't have a very good time defending that trademark. I got threatened with legal action for using a generic phrase which identifies what we do in a prominent position on my website. One of my competitors thought he was being clever by naming his company that phrase, which also happens to be the #1 search term for our area of business in New York. He got good Google ranking because of it, but when it came to defending his trademark he didn't have a hope in hell and I told him where to go. 
 
Sonar X1 is a strong all round trademark - I doubt anyone would get away with naming an unrelated product the same. But "Sonar" and "X1" are only strong trademarks in the field of DAW's. 

I feel the OP is over reacting. (you must have a lot of time on your hands! ) I see Sonar X1 as a strong trademark but not the X1 by itself. I see that as weak and there are many products that use that in their title, software included.
 
For example the now Emulator sampler software is called EMU X3. The first one must have been EMU X1. Cakewalk does not really own the term X1. So the new EMU sampler is X3, does that mean they can sue Cake now for using that term. EMU had it first after all.

Imagine the lunacy of Apple Records suing Apple Computer for using the name Apple. They basically lost but tried again later for a different reason... and lost again.
 
Whoever made the original apple should sue them both.
 

joeb1cannoli
Isn't X2 the same as dos equis? And it's the most interesting daw in the world. 

"I don't always record into my computer, but when I do..."
 
Unfortunately, your joke implies the next version of Sonar will not be able to be sold to minors (keep it clean.. this is a family forum). Or involve bad acting and explosions.