In 2009, melissa developed a hydrogen-powered engine for a car while working in her garage in her spare time. melissa installed the engine in a small car that she has been driving around town. in 2012, engineers working for ford motor co. independently developed an identical hydrogen powered engine. after completing tests on the engine for two years, ford filed a patent for the engine on march 1, 2014. onmarch 2, 2014, melissa also filed for a patent for her engine. assuming the engine satisfies all of the requirements for a patent, who is entitled to the patent?

a. ford, if ford is the first to sell the engine.
b. ford, because ford was the first to file for the patent.
c. melissa, because melissa was the first to invent the engine and put it into practice.
d. both melissa and ford must share in the patent rights.