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  2. Electric gate - Wikipedia

    en.wikipedia.org/wiki/Electric_gate

    At the end of the 19th century, electric gates were also used at horse racing tracks. [5] The first commercial electric gate systems were hydraulic and designed for reliability and ease of use. The cost of the hydraulic systems however meant that other companies started producing more affordable electromechanical alternatives.

  3. Powell v. Home Depot USA, Inc. - Wikipedia

    en.wikipedia.org/wiki/Powell_v._Home_Depot_USA,_Inc.

    Powell v. The Home Depot USA, Inc., 663 F.3d 1221 (Fed. Cir. 2011), [1] was a decision by the United States Court of Appeals for the Federal Circuit on the issue of patent infringement on a "safe hands" device that Michael Powell, an independent contractor for Home Depot, created in response to injuries to the hands of associates using in-store radial arm saws.

  4. Henry Louis Gates Jr. - Wikipedia

    en.wikipedia.org/wiki/Henry_Louis_Gates_Jr.

    Henry Louis Gates Jr. (born September 16, 1950), popularly known by his childhood nickname "Skip", [1] [2] is an American literary critic, professor, historian, and filmmaker who serves as the Alphonse Fletcher University Professor and the director of the Hutchins Center for African and African American Research at Harvard University.

  5. Logic gate - Wikipedia

    en.wikipedia.org/wiki/Logic_gate

    A logic circuit diagram for a 4-bit carry lookahead binary adder design using only the AND, OR, and XOR logic gates.. A logic gate is a device that performs a Boolean function, a logical operation performed on one or more binary inputs that produces a single binary output.

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