I you look at Pyrogenesis financials, they have Pierre Carabin and propably couple of assistants doing companys R&D:

"During the three-months ended March 31, 2023, the Company incurred $0.3 million of R&D costs on internal projects, a decrease of 33% as compared with $0.5 million in Q1 2022. The decrease in Q1 2023 is primarily related to a decrease in employee compensation, subcontracting, and materials and equipment, offset by the increase in other expenses of $0.2 million related to equipment rentals."