According to the Public Use Doctrine for Patents, ________

Multiple Choice

According to the public use doctrine for patents, ________.

A) the inventor has to test his invention in the public domain, to measure its validity, before being granted a patent
B) an invention cannot be used in the public domain prior to it being granted a patent
C) a patent will not be granted if the invention was already in public use for one year before filing application
D) the invention will come into the public domain once its term period has expired