I found the patents for two of my Grandad’s (Frank Fox) inventions.  The first one is for a device similar to the Rubik’s cube, but my Grandad filed for the patent in 1970, quite a few years before Rubik.

This patent can be found here:  GB1344259A – Spherical 2x2x2

The second was for “The Box”, which was effectively a very powerful graphic equaliser, which measured the volume and depth of sound.  I can’t really do it justice from my poor explanation of it.  Granada Studios purchased a few to help them get the sound levels correct when recording Coronation Street.

Here’s his patent:  GB2134687A – The Box