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Morton F Roseman

Piotr Z Rudkowski

Arthur Yelon

Mariana Ciureanu, Legal Representative

Mark A Roseman

A high sensitivity magnetic anomaly detector for geomagnetic exploration comprises a shorted coaxial transmission line having as central conductor an amorphous magnetic wire. A static magnetic field is applied along the transmission line. A transverse electromagnetic wave also propagates along the transmission line and excites a ferromagnetic resonance of the magnetic ions located within the depth of penetration of the circumferential microwave magnetic field into the magnetic wire. The microwave giant magnetoimpedance effect occurring in the magnetic wire changes the magnetic wire impedance as follows: the real part of the impedance peaks and the imaginary part passes through zero at a given frequency (the ferromagnetic resonance frequency). This frequency depends on the saturation magnetization of the magnetic wire and the strength of the static magnetic field. A slight variation of the Earth's magnetic field (a magnetic anomaly) changes this frequency, thus providing information about large metallic masses hidden under the Earth's surface or underwater.

Magnetic anomaly detector and method using the microwave giant magnetoimpedence effect

Apparatus for authenticating products and authorizing processes using the magnetic properties of a marker

This invention provides a system that utilizes the magnetic properties of specific materials to provide an authentication and/or authorization function. The system consists of two parts. The first is a marker that contains a magnetic material with spectral magnetic properties and is attached to the item that is to be authenticated or is to be part of a subsequent information transfer process requiring authorization. The second is a reader. The reader contains a transmitter that generates the electromagnetic search field and energizes the magnetic material and a receiver that analyzes the signal produced by the resulting interaction with the magnetic material and gives a go/no go decision based upon a match with stored information. The reader employs a feedback control system to stabilize the measurement environment, thereby producing accurate, high quality results. The go/no go signal in itself can be used as the authentication signal and can also be used to energize an actuator for the purpose of automatically authorizing a process such as photocopying, sending a fax, data copying and data communication.

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Thornhill, Canada

Morton F Roseman