Which of the Following Statements Is True of the Patent

Multiple Choice

Which of the following statements is true of the patent period in the United States?

A) After the patent period runs out, the patented invention is retracted from the public domain.
B) After the patent period runs out, the patented invention enters the inventor's private domain.
C) The patent period begins to run from the date the patent application is filed.
D) The patent period begins to run from the date the patent is issued.