The Activist Post mentions these seven destroyed breakthroughs that may have changed our lives:
1. Nikola Tesla (1856-1943) – Wardenclyffe Tower Project – free energy.
One of Tesla’ most famous experiments /inventions was to provide everyone on the globe with free energy through harnessing electricity from the Earth’s ionosphere. He died broke.
2. Raymond Rife (1888-1971) and his Universal Microscope for curing cancer. After successfully curing a number of cancer patients the American Medical Association (AMA) closed down Rife’s set ups and seizing his equipment. 
3. Wilhelm Reich (1897 – 1957) -Cloud busting and weather control.
Wilhelm Reich built an instrument he called the cloudbuster which successfully induced weather change. It has been used to break many droughts by producing clouds that make rain.
Consequentially, Wilhelm Reich was hounded by the likes of the government FDA. His equipment was seized and destroyed.
4. Linus Pauling (1901-1994) – ‘Unified Theory’ cure for heart disease.
Essentially, they found that heart disease is the result of a long-term vitamin C deficiency. The solution is to treat patients with frequent high doses (e.g. 6g/day) of vitamin C while using the amino acids lysine and proline to remove the atherosclerosis plaque lining the inner walls of the blood vessels.
However, government has not allowed it that much attention.
5. Stanley Meyer (1940-1998) and the car that runs on water.
Meyer invented a car that ran on water instead of the conventional fossil fuel gasoline. The car was able to travel from New York to Los Angeles on 22 gallons of water!
Meyer turned down the offer of a billion dollars to hand over the rights and patents. For this refusal, it has been said that he was murdered.
6. Harry Hoxey (1901–1974) -The Hoxey remedies for curing cancer.
Developed and handed down from successive generations, Harry Hoxey was able to use a herbal remedy and an externally applied paste to successfully treat cancer. The AMA and the Government FDA shut them all down and confiscated the medications. One clinic still survives…in Mexico.
7. The suppression of Nazi flying saucer technology.
Yes, many would consider 7 as ‘going off the rails’. Allegedly, the Nazis had developed antigravity flying saucer technology during World War II. It has been said that a secret base was made in the Antarctic which housed them.
Then in the latter part of 1945 these super weapons moved to another military base – the Schwarze Sonne – Black Sun on the dark side of the moon, probably parked right next to Darth Vader’s Death Star.
OK, so this “technology” was not benefiting humanity, and since space travel was only in the realm of science fiction, having this item on the list sadly puts all the previous items into question. Such is the nature of conspiracy theories; there is a good deal of truth, but then, like UFO’s it takes off into realms unknown. So, it is up to the reader to determine what is true.
Source: Activist Post
I tend not to believe this had there been technology that the big corporations were not allowing I would think that in the cold war the soviets would have found them out developed them because they were not interested in profit but discrediting any capitalisms and the west.