The Capehart-Farnsworth company was sold to IT & T in 1949. Here's a 1949 ad announcing the acquisition:
http://antiqueradio.org/art/Capehart...rth-ITT_Ad.jpg
You can read a little more company history here:
http://antiqueradio.org/CapehartFarn...Television.htm
1950s Capehart-Farnsworth TVs bear the names, but I suspect that Philo Farnsworth and Homer Capehart had little or nothing to do with those products. Capehart was pushed out of his own company in the 1930s, years before Farnsworth bought it. Farnsworth spent the 1950s doing unrelated research, as I understand it.
Postwar Farnsworth radios are not difficult to find.
Phil Nelson