"If Microsoft loses the trademark battle, it will have a much more difficult time fending off imitators that promote their products with variations of the same name. Company officials say customers would be in danger of buying inferior products and that rivals would effectively get a free ride at Microsoft's expense."
Some amusing entries:
Aperture, Apple, Aqua, Bonjour, Boot Camp, Capitals, Carbon, Charcoal, Chicago, Cocoa, Exposé, Gadget, Inkwell, Instruments, Keychain, Keynote, Leopard, Logic, New York, Numbers, Pages, Panther, Photo Booth, Quartz, Rosetta, Safari, Sand, Shake, Shuffle, Soundtrack, Spaces, Spotlight, Techno, Textile, Tiger, Time Capsule, Time Machine, Tremor, Tubes.
This is okay because trademarks have namespaces. It's just that namespace collisions result in lawsuits.