Ford Motor Co. is teaming with major medical equipment manufacturers, including the 3M Co. and GE Healthcare, to boost their production and to make face shields and 3-D print respirators.Concerns over a shortage of ventilators, personal protective equipment for health-care workers and more led President Donald Trump to invoke the Defense Production Act, opening the way for the government to call on private business to help. Automakers, including Ford, General Motors Co. and [...]