hey people this answer is hard to answer. but i got it. they have and they have worked. watch myth busters they can help you!
Eryn ROCKS PEOPLE
The first known jetpack was invented in 1919 by the Russian inventor Aleksandr Andreev. This early jetpack was called the “flying backpack” and used hydrogen peroxide as fuel. However, the modern concept of a jetpack that we are more familiar with today was developed in the 1960s.
Yes, jetpacks exist in real life and are being developed for various applications, such as transportation, recreation, and military use. However, current jetpack technology is still limited in terms of flight time and practicality compared to what is often seen in movies or video games.
No one has invented a teleportation machine yet, but my idea is to turn the person into a microchip and send it to a satellite through radar and send them anywhere.
As of now, there is no scientific evidence or credible information to suggest that a time machine has been invented. The idea of time travel remains a concept explored in science fiction and theoretical physics, rather than a practical reality.
"Pat Pend" refers to a patent pending status, indicating that a patent application has been filed but not yet granted. It does not refer to a specific invention.
The link has what you are looking for.
Not yet unless they have been invented by millionaires and not spread out to the rest of the world
it hasn't been invented yet.
Yes, the egg cracker has been invented.
What hasn't been invented is a flying car!
YES it has been invented
Bionic eyes have not been invented yet.
Umm it really as not been invented yet so... I can not really say yet
There are so many things that people of the past have dreamed of but never invented any failed invention is a thought of the past that hasn't been invented yet.
something that hasn't been invented yet is a teleportation device Manned Interstellar Travel
The aeroplane has not been invented yet.
No, it had not been invented yet.