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U.S. patents available from 1976 to present.
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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.

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Number of patents: 1
Last date: October 22, 2002

Number	Title	Issue Date
6467100	Water conservation apparatus for toilet A water conservation apparatus for use in a toilet having a dual action handle that is connected to an adjustable activating rod. The adjustable activating rod is connected to both a first pull chain for effectuating a full tank flush and a second pull ch...	10/22/2002