U.S pat: #2,415,012
R.T. James filed a patent application on the slinky on 21 August 1946. The patent issued in January 1947 as patent number 2,415,012.
The Slinky Mission ;
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the patent number is 5209584
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A patent number is the code that helps identify an invention.
a slinky a slinky fun for everyone a slinky a slinky
STS-135
The length of a Slinky spring if stretched out strait, or flat, would be the circumference of one turn of the Slinky times the number of turns in the Slinky.The circumference of a circle (shape of a slinky) is calculated as:C = 2 x PI x RWhere: C is Circumference, R is the Radius, and PI = 3.1415...The final equation would be as follows.slinky_length = 2 x PI x R x Each Slinky contains 67 feet of flat steel wire, and weighs approximately 1/2 pound.
The US patent number is US 7198789 B2.
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