Trademark is about context. You couldn't for example, maintain a trademark on a name that relates to the industry it applies to.
For example. You can't call your bakery 'Cookie' and expect to hold a trademark on it.
Thrust is a very common word, and if you are talking about a game where you use thrust, it is perfectly viable to use it.
Apple, and Windows, have nothing to do with computers. So when you see a computer with an apple on it, it can only mean one thing.
That is how trademarks work. It is about maintaining your uniqueness.
If you aren't unique to begin with. Such as. Super Alpha Turbo Thrust... Then anyone can come alone and make Super Alpha Turbo Squared to the 5th Power.
Can't use the entire same name, however.
If something is truely generic or common, then it can't be trademarked, but it has to relate to the product.
If I wanted to make a music store called "Cookie" then I could trademark it.
For example. You can't call your bakery 'Cookie' and expect to hold a trademark on it.
Thrust is a very common word, and if you are talking about a game where you use thrust, it is perfectly viable to use it.
Apple, and Windows, have nothing to do with computers. So when you see a computer with an apple on it, it can only mean one thing.
That is how trademarks work. It is about maintaining your uniqueness.
If you aren't unique to begin with. Such as. Super Alpha Turbo Thrust... Then anyone can come alone and make Super Alpha Turbo Squared to the 5th Power.
Can't use the entire same name, however.
If something is truely generic or common, then it can't be trademarked, but it has to relate to the product.
If I wanted to make a music store called "Cookie" then I could trademark it.