This is certainly a risky proposition, to use the cars without the logos. It would also seem more authentic to use the cars with their logos, and...

You have received fine answers from other attorneys. Indeed, common law trademarks may be used to cancel another's federal trademark registration....

Can I patent an idea if I change it a little from a product that is already patented

There are two issues: (1) is the existing product patented, or "patent pending" (meaning only that a patent application has been filed); and (2)...

Yes, it is possible to do as you suggest. The claims of a patent application or granted patent, along with functioning to define the patented...

When will patent no. US 6,232,016 B1 Expire?

I agree with Walter and David. You should also know that even if maintenance fees (MF) have not been paid, US patents may effectively be "revived"...

What is the most inexpensive way I can trademark my idea/product?

Trademark rights depend on use of the mark "as a trademark", that is, for selling a product or service. The trademark needs to appear prominently...

Patent pending question ?

I agree with Walter here, you need to get some good counseling by a US registered patent attorney or patent agent. In the process of obtaining a US...