I've only 'invented' two things of any note.
My first was black Band Aids, Elastoplasts, or whatever they're called where you live. Back in the 60's it seemed strange to me that these plasters should all be 'caucasian' pink colour, I believe that darker ones are now widely available. I should have copyrighted my brilliant idea.
My other genius invention is the '3 Temperature Electric Cro Kettle'. This would have 3 buttons, 1; boiling, 2: late for train, and 3: student.
People with average time on their hands would make their coffee/tea with button No 1's 'boiling' water. Those with a train to catch (or had overslept) might choose hottish No 2's 'late for train'. And those students for whom everything has to be instant, would choose No 3's tepid 'student' button (pour-stir-drink-n-rush).
The No 3 button would also come in useful for the student stand-by (and probably stand-up) meal of extremely instant Pot Noodles (ramen).
I think it's a winner; although I haven't copyrighted this one either!
p.s. I should add that Lady Magnon likes her water 'twice-boiled'. During and after the initial boiling she usually goes off somewhere to look for her glasses/shoes/phone/handbag/the dogs/etc. Then after a delay of about 15 minutes, the water is given a second (and more thorough) boiling, before being used.
Maybe the Cro Kettle should have a fourth 'repeat' button.