USPTO Issues World?s First Invisibility Cloak Patent
Microwave invisibility cloak.
Earlier today?Fractal Antenna Systems, Inc. announced that they have recently been awarded the first patent on an invisibility cloak by the United States Patent and Trademark Office ? U.S. Patent No.?8,253,639, titled ?Wideband electromagnetic cloaking systems.? ?Invisibility cloaks have long been a prop in science fiction stories, such as the Harry Potter invisibility cloak or the device used to cloak the Romulan bird of prey in Star Trek. ?The concept of invisibility goes back even much further in the writings of H.G. Wells and others. ?But the science fiction invisibility cloaks seem to suggest that objects could be rendered invisible by diverting waves in a ?see thru? effect. ?That is at least the path that these cloaks inspired researchers to take, seemingly to great affect.The ?639 patent?disclosure relates to techniques for cloaking objects at certain wavelengths / frequencies or over certain wavelength / frequency ranges (bands). Such techniques can provide an effective electromagnetic lens and/or lensing effect for certain wavelengths / frequencies or over certain wavelength / frequency ranges (bands). ?Representative frequencies of operation can include, but are not limited to, those over a range of 500 MHz to 1.3 GHz. Operation at other frequencies, including for example those of visible light, infrared and ultraviolet are also contemplated by the disclosure and could be achieved by appropriate scaling of dimensions and selection of shape of the resonator elements.
According to the inventor,?Nathan Cohen, who is an astrophysicist and expert in optics,?a viable infrared invisibility cloak is months away and a visible light cloak perhaps two years away. Notwithstanding, the patenting of the?world?s first invisibility cloak is a milestone in innovation.
Cohen notes that some in?the public may believe invisibility cloaks had been realized and invented as far back as 2006, by others. ?In truth, the patent office has rejected their claims for an invisibility cloak,? said Cohen. ?Fractal?s award of Patent 8,253,639 is the first invisibility cloak patent award.?
The patent claims awarded in the ?639 patent do seem somewhat broad, which could make this patent an important, pioneering patent. ?Claim 1 covers the following:
1. An electrical resonator system, comprising: a plurality of concentric electrical resonator shells, each shell including a substrate having first and second surfaces and a close-packed arrangement of electrically conductive material formed on the first surface, wherein the closed-packed arrangement comprises a plurality of self-similar electrical resonator shapes and is configured to operate at a desired passband of electromagnetic radiation; wherein the close-packed arrangements of at least two of the electrical resonator shells are different in size and/or shape; and wherein a resonator in the close-packed arrangement comprises a second order or higher fractal.
Fractal Antenna Systems has geared up development and production for invisibility cloak applications. First uses will be to improve coverage in ?blind spots? for microwave telecommunications and to remove antenna shadows. This use is explained in a 6 minute video produced by the company and uploaded to YouTube, which you can see below:
The company is also giving public demonstrations at colloquia and conferences. ?It?s real. Come and see it. With the issued patent there?s nothing to hide, except maybe Harry,? said Cohen.
For those interested in more discussion of cloaking from a scientific, but approachable level, take a look at How Invisibility Cloaks Work on HowStuffWorks.com.
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About the Author
Gene Quinn is a US Patent Attorney, law professor and the founder of IPWatchdog.com. He is also a principal lecturer in the top patent bar review course in the nation, which helps aspiring patent attorneys and patent agents prepare themselves to pass the patent bar exam. Known by many as ?The IPWatchdog,? Gene started the widely popular intellectual property website IPWatchdog.com in 1999, and since that time the site has had millions of unique visitors. Gene has been quoted in the Wall Street Journal, the New York Times, the LA Times, CNN Money, NPR and various other newspapers and magazines worldwide. He represents individuals, small businesses and start-up corporations. As an electrical engineer with a computer engineering focus his specialty is electronic and computer devices, Internet applications, software and business methods.
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Source: http://www.ipwatchdog.com/2012/09/07/uspto-issues-worlds-first-invisibility-cloak-patent/id=27841/
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