How long do patents usually last for?

The correct answer is B. 20 years.

A patent is a right granted by the government to an inventor, giving them the exclusive right to make, use, sell, and offer to sell an invention for a limited period of time in exchange for the public disclosure of the invention. The term of a patent is 20 years from the date on which the application for the patent is filed in the United States.

Option A is incorrect because a patent typically lasts for 20 years, not 10 years.

Option C is incorrect because a patent typically lasts for 20 years, not

23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube