The inclusive brain wave was patented on September 7, 1999 by David J. Blumberg and DoYouDo chief executive officer Gil S. Sudai, but distinct websites were already employing the methodology by that date, and thus apparently were allowed to continue using it. United States Patent 5,950,200 points out several potential flaws in traditional courtship and in conventional dating systems in which strangers meet online, promoting anonymous matching of friends and acquaintances as a more useful alternative.

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