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  2. History of perpetual motion machines - Wikipedia

    en.wikipedia.org/wiki/History_of_perpetual...

    Howard Robert Johnson developed a permanent magnet motor and, on April 24, 1979, received U.S. patent 4,151,431. [The United States Patent office main classification of his 4151431 patent is as an "electrical generator or motor structure, dynamoelectric, linear" (310/12).]

  3. Dynamo - Wikipedia

    en.wikipedia.org/wiki/Dynamo

    Dynamo. "Dynamo Electric Machine" (end view, partly section, U.S. patent 284,110) A dynamo is an electrical generator that creates direct current using a commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based ...

  4. Boggle - Wikipedia

    en.wikipedia.org/wiki/Boggle

    Boggle is a word game in which players try to find as many words as they can from a grid of lettered dice, within a set time limit. It was invented by Allan Turoff [1] and originally distributed by Parker Brothers.

  5. Diceware - Wikipedia

    en.wikipedia.org/wiki/Diceware

    Diceware is a method for creating passphrases, passwords, and other cryptographic variables using ordinary dice as a hardware random number generator. For each word in the passphrase, five rolls of a six-sided die are required. The numbers from 1 to 6 that come up in the rolls are assembled as a five-digit number, e.g. 43146. That number is then used to look up a word in a cryptographic word ...

  6. List of Nikola Tesla patents - Wikipedia

    en.wikipedia.org/wiki/List_of_Nikola_Tesla_patents

    U.S. patent 445,207 - Electro-Magnetic Motor - 1891 January 27 - Describes the combination, in a motor, of a primary energizing circuit (connected to a generator) and a secondary circuit in inductive relation to the primary; Each circuit has a different electrical character, resistance, induction capability, or number and type of windings.

  7. Google Patents - Wikipedia, the free encyclopedia

    en.wikipedia.org/wiki/Google_Patents

    Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.

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