Stephen M Curry, Age 79Albuquerque, NM

2001001, Aug 16, 2001

Jan 17, 2001

09/764581

Stephen Curry - Dallas TX, US
Michael Bolan - Dallas TX, US

Dallas Semiconductor Corporation

G06K019/06

235/492000

A secure monetary system comprises an electronic module and equipment to access the electronic module. The electronic module comprising a substantially token-shaped module and secure memory circuitry to store monetary information. The secure memory positioned in the substantially token-shaped module. The equipment accesses and manipulates the monetary information stored in the memory in the electronic module. The equipment comprises memory to store control and encryption programs and the memory is coupled to a microprocessor, which is also coupled to the electronic module and a control panel. The microprocessor is secure.

2002001, Feb 14, 2002

Apr 6, 2001

09/827825

Stephen Curry - Dallas TX, US
Michael Bolan - Dallas TX, US
Kevin Deierling - Dallas TX, US
William Payne - Garland TX, US
Hal Kurkowski - Dallas TX, US
Donald Dias - Carrollton TX, US
Gary Zanders - Dallas TX, US
Robert Lee - Denton TX, US
Guenter Lehmann - The Colony TX, US

Dallas Semiconductor Corporation

G01K007/00
G01K007/01

374/178000, 374/163000, 374/170000

Serial bus modules with unique multibit identifications that may be searched with multiple modules on a single bus. Modules may contain temperature history per integrated Arrhenius temperature dependent signal. Modules may be packaged as tokens or as two or three lead plastic plastic, also with the three lead packages further functionality as sensors or switches may be incorporated into the modules.

6217213, Apr 17, 2001

May 26, 1998

9/084516

Stephen M. Curry - Dallas TX
Michael L. Bolan - Dallas TX
Kevin E. Deierling - Dallas TX
William Lee Payne - Garland TX
Hal Kurkowski - Dallas TX

Dallas Semiconductor Corporation - Dallas TX

G01K 304

374178

A temperature-controlled counter/clock arrangement is provided where th rate or frequency of the counting is temperature dependent. This allows for a measuring of thermal accumulation and/or history. The temperature sensing is based upon the use of the varying current that will flow through a toward biased semiconductor diode. In one embodiment a constant voltage source is used so that the current variation will follow Arrhenius's law.

5974504, Oct 26, 1999

Jul 15, 1998

9/116020

Robert D. Lee - Denton TX
Stephen M. Curry - Dallas TX
Michael L. Bolan - Dallas TX
Hal Kurkowski - Dallas TX
Donald R. Diaz - Carrollton TX
Francis A. Scherpenberg - Dallas TX

Dallas Semiconductor Corporation - Dallas TX

G06K 19067
H01L 2302

711115

A secured metal token using a single wire communication system is employed to dispense units of value and to provide a secure storage device for controlling the dispensing of articles or service items. The metal token can be formed of two pieces with a simplified electronic circuit inside which can contain units of value for the dispensing of items using the memory within the metal token as a secure vault. The token uses a simple two wire (ground and combined clock/data) arrangment. As goods are purchased or services rendered the value of those good or services is deducted from a prestored amount within the token.

6112275, Aug 29, 2000

Dec 28, 1994

8/365252

Stephen M. Curry - Dallas TX
Michael L. Bolan - Dallas TX
Kevin E. Deierling - Dallas TX
William Lee Payne - Garland TX
Hal Kurkowski - Dallas TX
Donald R. Dias - Carrollton TX
Gary V. Zanders - Dallas TX
Robert D. Lee - Denton TX
Guenter H. Lehmann - The Colony TX

Dallas Semiconductor Corporation - Dallas TX

H03K 708

711100

A method of communicating information between a host device and a potentially portable module device which measures thermal accumulation over time via a temperature controlled counter. The temperature controlled counter may operate using substantially Arrhenius' law. The host device communicates with the portable module via a single wire bidirectional data bus. The single wire bus and one-wire communication protocol allows data flow between a host and a plurality of devices connected to the single wire bus. The single wire bus allows for a great versatility of uses for the portable module.

5506991, Apr 9, 1996

Dec 19, 1990

7/631929

Stephen M. Curry - Dallas TX
Michael L. Bolan - Dallas TX
William L. Payne - Garland TX
Kevin E. Deierling - Dallas TX
Guenter H. Lehmann - Dallas TX

Dallas Semiconductor Corporation - Dallas TX

G06F 1300

395800

A printer port adapter which permits electronic keys to be accessed through the printer port of the PC, without disrupting the normal operation of the printer port in any mode of operation whatsoever. The electronic keys used have a one-wire signal interface, and this interface can be inserted into the full standard ISA printer port pin assignment, as well as the all known nonstandard additional assignments which have been overlaid onto the standard printer port.

5864872, Jan 26, 1999

May 28, 1996

8/654464

Robert D. Lee - Denton TX
Stephen M. Curry - Dallas TX
Michael L. Bolan - Dallas TX
Hal Kurkowski - Dallas TX
Donald R. Diaz - Carrollton TX
Francis A. Scherpenberg - Dallas TX
Kevin E. Deierling - Los Altos Hills CA

Dallas Semiconductor Corporation - Dallas TX

G06F 1200

711115

A communication circuit is provided in which reads from a device are controlled by sensing a transition by a host communicating with a device. The device then accepts a one which holds the line high for a predetermined time period or accepts a zero when the line is held high for a different time period. The sending of data is accomplished in a symmetrical relationship by having the device after the host pulls the line high by either by allowing the line to remain high or forcing the line to ground within the requisite time periods. This allows the "slave" device to consume almost no power in either the read or the write modes.

5850450, Dec 15, 1998

Jul 19, 1996

8/690272

Peter Schweitzer - Watertown MA
Stephen M. Curry - Dallas TX
Wendell L. Little - Denton TX
Bryan M. Armstrong - Dallas TX
Christopher W. Fox - Dallas TX
Donald W. Loomis - Coppell TX

Dallas Semiconductor Corporation - Dallas TX

H04L 900

380 30

A portable electronic data module for secure transactions, the electronic data module having a random number generator and an optimized co-processor for producing unbreakable key sets for a two-key cryptosystem. A real-time clock is sampled depending upon an external random event series such as power-ups of the data module by a host apparatus, and based upon the contents of the sample thus obtained, the entropy of a previously-loaded accumulator is further enhanced to achieve a pool of true random numbers. By repeatedly requesting random bytes of information from said pool of random numbers, large random numbers are created which are then rendered prime and used for key set creation.