Here's the example that triggered me to ask this question
Sony Corp. said Thursday it wants to become the biggest player in Japan's growing Android tablet market by changing the way the devices are used.
If we take a look at the use of tense in the above sentence, we can see the past tense was used for the main sentence, "Sony Corp. said Thursday." I am happy with that.
But when it comes to its objective clause (hopefully that's the right term here), the tense somehow is not consistent with the main sentence, indicating the present tense by using the verb wants. Is it grammatically correct or not? I'd appreciate if someone can explain it to me.