The Inventions That Vanished.Some invent

In the nineteen nineties, nickel metal hydride batteries gave early electric cars something they desperately needed: useful range.
The technology helped power General Motors' EV one. Then ownership of key battery interests moved from General Motors to Texaco, Texaco merged with Chevron, and patent disputes followed.
Was a practical electric car battery deliberately held back?
Or did nickel metal hydride simply lose the race to lithium ion?

Imagine spending years developing a new technology, filing a patent to protect it, and then receiving an order telling you that the invention cannot be published.
No mysterious corporation needs to buy it. No laboratory has to disappear. Under United States law, inventions considered sensitive to national security can be placed under secrecy orders that delay publication and patent issuance.
This episode investigates the Invention Secrecy Act, the hidden national security review behind the patent system, the technologies governments have historically watched, and the uncomfortable question at the center of it all.
How many important inventions have existed without the public ever knowing?

Eugene Mallove believed mainstream science had dismissed cold fusion too quickly. An MIT trained engineer, Harvard doctorate, science writer, and founder of Infinite Energy, he spent years arguing that laboratory evidence for anomalous heat deserved another look.
Then, in two thousand four, Mallove was found brutally murdered outside his childhood home.
For years, his death became irresistible material for theories about suppressed energy research. But when investigators finally uncovered what happened, the answer exposed something even more important about conspiracy stories.
Sometimes nearly every suspicious detail is real.
And the conclusion is still wrong.