As coronavirus sweeps the globe, there is not a single Trilogy Evo Universal ventilator — developed with government funds — in the U.S. stockpile. Meanwhile, Royal Philips N.V. has sold higher-priced versions to clients around the world.Five years ago, the U.S. Department of Health and Human Services tried to plug a crucial hole in its preparations for a global pandemic, signing a $13.8 million contract with a Pennsylvania manufacturer to create a low-cost, portable, easy-to-use ventilator that could be stockpiled for emergencies. This past September, with the design of the new Trilogy Evo Universal finally cleared by the Food and...