After the war ended, the United States opened access to his printed circuit innovation and since 1948, it has been used in all airborne instrument electronics. Very few companies acknowledged or licensed Technograph's patents and the company had financial difficulties. He resigned from Technograph in 1957. Among his projects as a freelancer, were films to heat "floor and wall coverings" and food, for example, fish fingers. The wallpaper idea was viable, but interest waned after the advent of cheaper energy resources with the discovery of natural gas in the North Sea.