Patrick Turner wrote:

The patent including the block diagram of Lilienfeld's radio
would have been a flop, since even if his unknown device worked at all
there would have been silence from the radio, since there is no
diode detector circuit shown.

The diode is a little hard to see on the diagram in the magazine, but it
is there. In the diagram's Figure 3, it is item 26 at the input to the
third transistor. It is easier to see on the scan of the original
diagram at the Patent Trademark Office.

The text of the patent is not available, which is unfortunate. I
suspect that the diagram was intended to illustrate functionality at a
block diagram level, rather than a ready-to-build schematic. For
example, only a single tuned circuit is shown, no power-supply bypassing
is shown, and no detector bypass (downstrem of the diode) is shown.

As Mr Spock would have said, "Fascinating!"

Bill Jeffrey