This was sort of a "To Tell The Truth" for mechanical devices. The show began with the whole panel sitting at a desk that was rolled out on a track through a pair of horizontally-hinged doors.
The inventions I recall included: (1) A lighted sign to be placed in the back of a car. There were three letters: "NOK." Turns out that this was for the two-lane roads that everyone drove in those pre-Interstate days. The guy behind you wanted to pass, but was it safe for him to do so? To communicate your assessment of the situation, you could illuminate the two letters "NO" or the other two "OK" to let him know.
(2) A dimple maker. It was a pair of big calipers that would sink a pair of rounded probes into your cheeks. I have not a clue what the utility would have been, but one of the panelists had fun trying it.
The show lasted only one season. I don't know why it was not a success, but because I happen to remember it in some detail, I've used it over the years to make people think I know more about old TV than I actually do.