Which of the Following Is True of Patents

Multiple Choice

Which of the following is true of patents?

A) For an invention to be patented, it has to be novel, useful, and obvious.
B) A patent number is assigned to a patent that is granted.
C) Patents last for an indefinite period of time and are the sole property of the inventor.
D) The patent term for a given patent begins to run from the date the patent is granted.