In stranger in a strange land he predicted the waterbed, something which didn't appear until a few years later, in 1968. > Charles Hall, who brought a waterbed

In stranger in a strange land he predicted the waterbed, something which didn't appear until a few years later, in 1968. > Charles Hall, who brought a waterbed design to the United States Patent Office, was refused a patent on the grounds that Heinlein's descriptions in Stranger and another novel, Double Star (1956), constituted prior art. https://en.wikipedia.org/wiki/Stranger_in_a_Strange_Land https://en.wikipedia.org/wiki/Stranger_in_a_Strange_Land