| Patent Number |
Title Of Patent |
Date Issued |
| 7286421 |
Active compensation for operating point drift in MRAM write operation |
October 23, 2007 |
| A method and apparatus for minimizing errors that may occur when writing information to a magnetic memory cell array with an operating write current due to changes in the local magnetic fields and. A test write current is sent to a reference memory cell and the effect of the test cur |
| 6958929 |
Sensor compensation for environmental variations for magnetic random access memory |
October 25, 2005 |
| A compensation system for an array of magnetic memory cells measures local operating conditions and compensates for changes in the operating characteristics of the magnetic memory cells in the array that result from the changes in the operating conditions. The magnetic field strength nea |
| 6927569 |
Techniques for electrically characterizing tunnel junction film stacks with little or no process |
August 9, 2005 |
| Probes are electrically connected to a surface of a tunnel junction film stack comprising a free layer, a tunnel barrier, and a pinned layer. Resistances are determined for a variety of probe spacings and for a number of magnetizations of one of the layers of the stack. The probe spa |
| 6590750 |
Limiting magnetoresistive electrical interaction to a preferred portion of a magnetic region in |
July 8, 2003 |
| Magnetoresistive devices are disclosed which include a changeable magnetic region within which at least two magnetic states can be imposed. Upon magnetoresistive electrical interaction with the device, the relative orientation of the magnetic states of the changeable magnetic region, and |
| 6469690 |
Data sharing for multi-CPU mouse/keyboard switcher |
October 22, 2002 |
| A work station comprising a plurality of computers, and a method of operating that work station. Each of the computers at the work station includes a keyboard port and a pointing device port; and the work station further comprises a single external user keyboard, a single external po |
| 6452764 |
Limiting magnetoresistive electrical interaction to a preferred portion of a magnetic region in |
September 17, 2002 |
| Magnetoresistive devices are disclosed which include a changeable magnetic region within which at least two magnetic states can be imposed. Upon magnetoresistive electrical interaction with the device, the relative orientation of the magnetic states of the changeable magnetic region, and |
| 6368878 |
Intentional asymmetry imposed during fabrication and/or access of magnetic tunnel junction devic |
April 9, 2002 |
| Magnetic memory cells include a changeable magnetic region with a magnetic axis along which two directions of magnetization can be imposed, thereby providing two respective states into which the cells are changeable according to electrical and resultant magnetic stimuli applied thereto. |
| 6239936 |
Method and apparatus for calibrating a thermal response of a magnetoresistive element |
May 29, 2001 |
| A method and apparatus for calibrating a thermal response of a magnetoresistive element is provided. In accordance with one embodiment of the invention, a thermal spacing signal is read using an MR element spaced apart from a surface of a moving storage medium. From the thermal spacing |
| 6104633 |
Intentional asymmetry imposed during fabrication and/or access of magnetic tunnel junction devic |
August 15, 2000 |
| Magnetic memory cells include a changeable magnetic region with a magnetic axis along which two directions of magnetization can be imposed, thereby providing two respective states into which the cells are changeable according to electrical and resultant magnetic stimuli applied thereto. |
| 6088176 |
Method and apparatus for separating magnetic and thermal components from an MR read signal |
July 11, 2000 |
| An apparatus and method for reading an information signal from a magnetic storage medium using a magnetoresistive (MR) head, and separating a thermal signal component and, if present, a magnetic signal component from the information signal. A signal separation/restoration module eliminat |
| 6072718 |
Magnetic memory devices having multiple magnetic tunnel junctions therein |
June 6, 2000 |
| Magnetic memory devices are disclosed having multiple magnetic tunnel junctions therein writable together into an average state. For example, a magnetic random access memory ("MRAM") array is disclosed having respective pluralities of crossing first and second electrically conductive |
| 6069615 |
Single pointing device/keyboard for multiple computers |
May 30, 2000 |
| The invention discloses a microprocessor controlled assembly which allows multiple computers and display screens to be controlled using a single external pointing device/keyboard combination. The invention can provide nearly user-invisible switching for a selection of a particular comput |
| 6052249 |
Method and apparatus for data storage using thermal proximity imaging |
April 18, 2000 |
| A method and apparatus for accessing a data storage medium having raised and lowered portions indicative of data stored on the medium. Energy is supplied to a sensor which is moved relative to, and in close proximity to, a surface of the medium on which the data in the form of raised and |
| 6019503 |
Method for identifying surface conditions of a moving medium |
February 1, 2000 |
| A method and apparatus for mapping the character and location of medium conditions for a planar surface. Energy is supplied to a head in close proximity to the planar surface to thereby raise the temperature of the object. The head is moved with respect to the planar surface while keepin |
| 6004030 |
Calibration apparatus and methods for a thermal proximity sensor |
December 21, 1999 |
| Apparatus and methods for calibrating a thermal proximity sensor are disclosed. Thermal responses from a thermal proximity sensor are used to sense the instantaneous distance between the sensor and a medium over which the sensor is moved, in a data storage system. Sensing the instant |
| 5946228 |
Limiting magnetic writing fields to a preferred portion of a changeable magnetic region in magne |
August 31, 1999 |
| Magnetic devices are disclosed which include a changeable magnetic region, within which each of two magnetic states can be imposed, using an applied magnetic writing stimuli. Upon subsequent electrical tunneling through the device, for example, the relative orientation of the magnetic st |
| 5850374 |
Method and apparatus for data storage using thermal proximity imaging |
December 15, 1998 |
| A method and apparatus for accessing a data storage medium having raised and lowered portions indicative of data stored on the medium. Energy is supplied to a sensor which is moved relative to, and in close proximity to, a surface of the medium on which the data in the form of raised and |
| 5810477 |
System for identifying surface conditions of a moving medium |
September 22, 1998 |
| A method and apparatus for mapping the character and location of medium conditions for a planar surface. Energy is supplied to a head in close proximity to the planar surface to thereby raise the temperature of the object. The head is moved with respect to the planar surface while keepin |
| 5806978 |
Calibration apparatus and methods for a thermal proximity sensor |
September 15, 1998 |
| Apparatus and methods for calibrating a thermal proximity sensor are disclosed. Thermal responses from a thermal proximity sensor are used to sense the instantaneous distance between the sensor and a medium over which the sensor is moved, in a data storage system. Sensing the instant |
| 5753803 |
Apparatus and methods for maintaining a substantially constant temperature in a thermal proximit |
May 19, 1998 |
| Apparatus and methods for improved thermal proximity imaging are provided. A data storage medium surface is moved relative to a sensor, in one embodiment a magnetoresistive read/write element. Topographical variations on the storage medium induce temperature changes in the sensor. These |
