This 20 March 2020 video from the USA says about itself:
Greedy Company Wants To Sue Life Saving Hero Doctors During Pandemic
After two Italian volunteers used a 3-D printer to manufacture a desperately needed ventilator component for those stricken by the coronavirus, the medical company with the patent for the device threatened to sue—even as the printed valves saved at least 10 people’s lives in a hospital in the northern Italian city of Brescia.
“There were people whose lives were in danger, and we acted,” Cristian Fracassi, who along with fellow volunteer Alessandro Ramaioli made the valves, said in a Facebook post on Sunday. “Period.” …
Fracassi and Ramaioli were asked by physicist Massimo Temporelli to assist with producing the valves for only $1 after supplies from the source medical company were not forthcoming. The company, which charges $11,000 apiece for the devices, did not share the technical specifications for producing the valve—leading the volunteers to measure the valves and print from those numbers—and has threatened to sue for patent infringement.
Read more here.