Great inventions of the last hundred years

Much of my long life has been devoted to the preparation and execution of deeds of unsolicited benevolence, with occasionally, for a change, some completely justified malicious actions causing great distress to the ungodly. In between these tasks I have had many utterly brilliant ideas come to me, often when I am having an attack of OAB. Any of them would make the world a better place. Sadly, it was never possible for me to take any of them forward to a patentable or even marketable stage for various reasons, the most usual one being that to achieve this would call for great energy, hard work, drive, some relevant skill or knowledge, and iron determination. None of these things are within my range and that prevented me from getting any further.

Here are four of them; skip the first if you are easily disgusted:

1  Pukejoy
Everyone knows how awful it is when you think you are about to be sick; you dread the pain and humiliation and the horrid taste you are left with. If you sip a glass of Pukejoy it will neither bring on nor delay the event, but it will ease the expulsion and leave in your mouth une sensation de fraicheur agréable with an overtone of  lemon, spearmint or kiwi fruit.

2  Tyresave
When an aircraft's landing wheels hit the tarmac there is a puff of smoke; this is the tyres burning rubber as they have to accelerate from zero to the landing speed in fraction of a second, and is why the hugely expensive tyres have to be replaced frequently.
It would be quite simple to fit vanes to the wheels, so designed that they will start to revolve in the slipstream as soon as they are lowered. The speed at which they revolve will depend on the speed of the aircraft, so with careful design they will hit the tarmac at exactly the speed needed to ensure that there is no puff of smoke.

3  Styenka Razin
This is the name of an old Russian song to which I intended to write some English lyrics and HERE I explain how Dusty Springfield's brother stopped me from doing so

4  Patients' Symptom Reporting System
This is based on three undeniable facts: that doctors' time is precious, that the waiting room reading matter is always depressing, and that an increasing number of patients would like to tell  tell a computer what is wrong with them rather than a doctor.
In the waiting room there would be a couple of old PCs donated by local firms and a notice would ask patients if they would like to record their symptoms. Those that do can sit down at a screen and switch on: there is no logging on and they are not asked to type in their name: instead, a question appears: What seems to be the trouble? There are a dozen answers offered and the patient chooses one, perhaps my elbow hurts. More questions come up: what they are depends on  the answer given to the first; these might be all the time?, or just when you bend it?, etc. Then so on until the questions have been answered, or the patient is called by the doctor, or just gets fed up. The last button is pressed and the program prints a report and deletes all the information that has been put in. The patient trots into the doctor with it; reading it takes him 30 seconds and he can then carry on the consultation, having saved himself the first  three minutes.

As I explained, none of these brilliant ideas will ever be exploited by me. Of course, someone else might take them up and try, and unless he can produce a document dated prior to this post proving that he thought of them himself then I shall call in m'learned friends; I might well be open to offers over 40%.