Eastman-kodak Company

Eastman Technology, Inc.

Cummins-allison Corporation

Mednovus, Inc.

Spin Physics, Inc.

Iomega Corporation

Frederick J Jeffers

Neil Smith

Richard J McClure

Jay D Freeman

Tomasz Marek Jagielinski

R Kemp Massengill

Robert O James

Peter VanderSalm Koeppe

Danny D Yang

Kent R Gandola

George S Krastev

Frederick Rockwell Chamberlain, Iv

Bradford D West

Tomasz Mark Jagielinski

James U Lemke

Ronald Myron Wexler

J Kelly Lee

James K Lee

Svetlana Reznik

Charles F Brucker

Charles R Moeller

Chao S Chi

Steven J Adamson

Frederick R Chamberlain

John Rolker

Greg A Burg

John F Condon

Sherman W Duck

Richard C Bachand

John L Simonds

David E Wachenschwanz

According to some embodiments of the invention, a magnetic sensor having a track width of greater than about 50 millimeters is provided. The magnetic sensor is adapted to detect a magnetic feature and produce a linear, analog output in response to the magnetic feature. The analog output is along a single data channel.

Currency discrimination system and method

A ferromagnetic detection pillar having one or more applied magnetic field sources and one or more magnetic field sensors, with the magnets and sensors arranged and adapted to detect a ferromagnetic threat object on one side of the pillar. A detection device, such as a motion detector or infrared detector, is also provided, to detect the presence of an object on a selected side of the pillar. A single free-standing pillar can be used, or two or more free-standing pillars can be arranged to constitute a variable aperture detection portal. Single sensors or multiple-sensor configurations can be used.

Ferromagnetic detection pillar

A method and apparatus for enhancing detection of a ferromagnetic threat object by magnetizing the threat object with a separate magnetic field, prior to scanning of the subject by a ferromagnetic-detecting sensor system.

Enhancement magnetizer for magnetic resonance imaging screening

A method and an apparatus are disclosed, to screen patients or other areas for ferromagnetic objects, particularly for use intra-operatively in an operating room. The device comprises at least one magnetic field source, at least one magnetic gradiometer, and the associated electronics. The field source and the gradiometer are supported by an arm structure which can be manipulated to position the field source and the gradiometer at one or more positions near areas of interest, such as areas on a patient or other subject, and to orient the field source and the gradiometer so that the axis of the magnetic field is arranged along three different non-parallel, non-coplanar, axes to ensure detection of any ferromagnetic object regardless of its shape and orientation. The device can be manipulated to place the sensor arrays in close proximity to selected parts of a subject's body, for screening purposes. Two field sources and two gradiometers can be provided, for positioning on two sides of a portion of the subject's body, such as the head.

Screening method and apparatus

A magnetic hubbing assembly for engaging and rotating the hub of a removable recording medium has a segmented hub and a hubbing magnet including four or more poles. The hubbing magnet is ring-shaped and the hub is a high permeability SiFe metal. Segments of the hub are equal in number to the number of poles of the magnet.

Segmented plate hub hold down system for recording medium

A particulate magnetic recording media wherein the magnetic particles are substantially spherical. The spherical particle shape makes possible a media which is magnetically isotropic, well dispersed and low in noise, and free of magnetically inferior broken particles.

Spherical magnetic particles for magnetic recording media

A camera comprises an information-bearing medium movable to record predetermined information on a filmstrip. The information-bearing medium is a magnetic roller recorder on which is magnetically stored the information, and which is rotationally supported in place for stationary rolling contact with a magnetic track on a filmstrip as the filmstrip is advanced, whereby the information can be repetitively recorded along the magnetic track on the filmstrip. The magnetic roller recorder can be provided apart from the camera as an owner-personalization accessory for the camera.

Camera with magnetic roller recorder for repetitively recording information along magnetic track on filmstrip

A magnetic field sensing system comprising:

Device to shield a magnetic field in a given plane

A copyright protection system is provided in which copyrighted articles, such as documents and photos, have associated with the article magnetic material which is detected when the article is copied on a scanner/reproducing machine. The magnetic material may be secured to the article so that it cannot be removed without destroying the article, or the magnetic material may form part of the article. The scanner/reproducing machine is provided with a magnetic detection system for automatically detecting the copyrighted article.

Copyright protection for photos and documents using magnetic elements

A credit and access control card and reader system comprising: a magnetically encodable card comprising a body having upper and lower surfaces and side and end edges, the body being formed of plastic material having magnetic particles uniformly dispersed throughout the plastic material; and a reader having a magneto resistive (MR) head for reading the magnetically encodable card as it is moved past the MR head.

Magnetic card and reader system

In order to measure the permeability of a magnetic material, a permanent magnet is positioned at a distance from the surface of a magnetic material. A first magnetic field sensor is placed proximate the magnetic material on the magnetic axis of the permanent magnet. The axis of sensitivity of the magnetic field sensor is perpendicular to the field of the permanent magnet and in a plane perpendicular to the surface of the magnetic material. A second magnetic field sensor for compensating for temperature and stray field effects can be positioned perpendicular to the magnetic axis of the permanent magnet with its axis of sensitivity parallel to the axis of sensitivity of the magnetic field sensor.

Hall effect sensor for detecting an induced image magnet in a smooth

Acicular barium ferrite (BaFe) particles with magnetic easy axes perpendicular to particle length are utilized as the magnetic particles in the recording medium of the invention. The BaFe particles are coated to lie 'side by side', onto the medium's substrate with the particles' lengths lying in the plane he medium and transverse to the direction of medium motion during recording. The optimum particle orientation for support of both perpendicular and longitudinal components is where the easy axes of the particles are randomly oriented in an X-Y plane wherein the X axis Ks along the direction of media motion, and the Y axis is perpendicular to the recording layer. To effect this random orientation, the just coated particles are subjected to a rotating magnetic field whose rotating vector lies in the X-Y plane. As the magnetic layer is transported through the field past the rotating vector, the lengths of the particles align parallel to the Z axis and the easy axes of the particles align with the changing rotating field causing them to assume random directions in the X-Y plane. A rotating magnetic field may be generated by scanning down a pre-magnetized magnetic layer consisting of alternating polarity magnetic segments. If the media substrate coated with the still liquid dispersion of the BaFe particles is passed over such a pre-magnetized surface, each point of the dispersion will experience a rotating magnetic field and the desired random orientation will be obtained. The rotating field may also be obtained by means of a rotating magnet.

Magnetic medium capable of supporting both longitudinal and

A magnetically encodable card made of a solid plastic material having uniformly dispersed magnetic particles throughout the plastic material. The card is preferably formed of two major faces with connecting edges. Data can be recorded on one or both of the major faces, and can also be recorded on one or more of the card edges.

Growing community of inventors

Escondido, CA, United States of America

Frederick J Jeffers