Daniel Chang

US Patent:

6578046, Jun 10, 2003

Filed:

Jun 5, 2001

Appl. No.:

09/873220

Inventors:

Daniel T. Chang - San Jose CA
Siyi Terry Donn - Saratoga CA
Douglas Michael Hembry - Los Gatos CA
Tae Jae Lee - Cupertino CA
Basuki N. Soetarman - Los Gatos CA
Robert N. Summers - San Jose CA
Frank C. Tung - Saratoga CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1730

US Classification:

707103, 707100, 707 10, 707 4

Abstract:

A computer method and system capable of searching multiple heterogeneous datastores with heterogeneous data types by employing an object oriented data model to define a federated datastore object. The federated query object translates a generic query into the appropriate queries for each datastore, the federated datastore object acts as a virtual datastore for multiple heterogeneous datastores with the ability to map concepts between datastores, and the federated collection object represents results from a federated query in a hierarchy that maintains sub-grouping information from each datastore to allow accessing of results by datastore or as a single collection of results. The federated objects thus provide user applications with enhanced accessibility of different hierarchies of information, as well as more robust search capabilities.

US Patent:

6584459, Jun 24, 2003

Filed:

Jun 2, 1999

Appl. No.:

09/325661

Inventors:

Daniel T. Chang - San Jose CA
Josephine M. Cheng - San Jose CA
Jian Xu - San Jose CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1730

US Classification:

707 3

Abstract:

An extender for a computer-implemented relational database system is disclosed for storing, querying, and retrieving structured documents. The extender provides a new abstract data type and includes a plurality of user defined functions for storing, querying, and retrieving structured documents internally, as character-based large objects (CLOB), or externally, in flat files or URLs, for example. A method and apparatus using an extender having a âconditional selectâ functionality is further disclosed for querying structured documents. The âconditional selectâ functionality is based on user defined functions residing within the extender being applied to a projection in a structured query in the database system. A method and apparatus using an extender having a set of user defined functions is further disclosed for creating one or more indexes for structured documents stored in the relational database system. The method uses the set of functions to create the indexes and uses already created B+ tree index structures implemented in the database system to support the indexes.

US Patent:

6661276, Dec 9, 2003

Filed:

Jul 29, 2002

Appl. No.:

10/209211

Inventors:

Daniel Chang - Fremont CA

Assignee:

Lovoltech Inc. - Santa Clara CA

International Classification:

H03K 17687

US Classification:

327427, 327430

Abstract:

A matching circuit for coupling a conventional metal-oxide semiconductor field effect transistor (MOSFET) driver to the gate of a junction field effect transistor (JFET). A driver circuit optimized for driving a MOSFET is combined with a matching circuit to provide gate drive for a JFET. The matching circuit comprises a resistor and capacitor in parallel. For driving enhancement mode JFETs having a gate grid array structure and a pinch-off voltage greater than 0. 4 volts, the range of resistor values is 10 to 200 ohms, and the range of capacitor values is 1 to 100 nF. For devices having a pinch-off voltage less than 0. 4 volts, the range of resistor values is 100 to 2000 ohms. The matching circuit may further include a diode to provide a bias.

US Patent:

6769014, Jul 27, 2004

Filed:

Jul 1, 1998

Appl. No.:

09/108854

Inventors:

Daniel T. Chang - San Jose CA
Neelakantan Sundaresan - San Jose CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1516

US Classification:

709206, 707 10, 707103

Abstract:

A Mail Facility Layer providing a general, semantics-free mail paradigm for asynchronous communication between distributed objects. It provides a level of abstraction in terms of mail, virtual mailbox, post office, and mail queue. It hides the details of implementation and transport and provides location transparency. A mail is asynchronously communicated between distributed objects by associating a destination with a name, wherein the destination is located on a remote system; associating the name with a first virtual mailbox representing the destination, wherein the first virtual mailbox is located on a local system; creating the mail; opening the first virtual mailbox; putting the mail in the first virtual mailbox; sending the mail from the first virtual mailbox to a second virtual mailbox, wherein the second virtual mailbox is located on the remote system; opening the second virtual mailbox; and getting the mail from the second virtual mailbox.

US Patent:

7417266, Aug 26, 2008

Filed:

Jun 10, 2005

Appl. No.:

11/149718

Inventors:

Jian Li - Sunnyvale CA, US
Daniel Chang - Fremont CA, US
Ho-Yuan Yu - Saratoga CA, US

Assignee:

QSpeed Semiconductor Inc. - Santa Clara CA

International Classification:

H01L 27/088

US Classification:

257135, 257272, 257329, 257330, 257E2926, 257E29265

Abstract:

A field effect transistor, in accordance with one embodiment, includes a metal-oxide-semiconductor field effect transistor (MOSFET) having a junction field effect transistor (JFET) embedded as a body diode.

US Patent:

7590681, Sep 15, 2009

Filed:

Aug 7, 2000

Appl. No.:

09/632897

Inventors:

Daniel T. Chang - Belmont CA, US
Jay Raju - Fremont CA, US
Rodric C. Fan - Fremont CA, US
Haiqi Chen - Sunnyvale CA, US
Paul Chen - San Jose CA, US

Assignee:

Trimble Navigation Limited - Sunnyvale CA

International Classification:

G06F 15/16

US Classification:

709203, 709206, 709214, 709228

Abstract:

A method and a system allow presentation of web pages to an internet appliance (e. g. , a hand-held computer, a mobile telephone, or a digital personal assistant) according to user preferences. The user preferences are captured by a management server, which provides a web page customization service in conjunction with a document manager, which parses the web pages to identify information units. The customized web pages are stored in a database using a standardized hypertext document representation device, such as XML. The customized web pages are accessible from a portal adapted for accessing by the internet appliance. In one implementation, the user is also offered pre-configured resources for frequently used services when accessing the portal using the internet device.

US Patent:

7714398, May 11, 2010

Filed:

Mar 27, 2006

Appl. No.:

11/390493

Inventors:

Nadav Ben-Barak - Berkeley CA, US
Daniel M. Chang - Danville CA, US
Jean-Christophe P. Gabriel - Pinole CA, US
Vikram Joshi - Newington CT, US
Joseph Niemann - Fremont CA, US
Alexander Star - Pittsburgh PA, US
Christian Valcke - Orinda CA, US

Assignee:

Nanomix, Inc. - Emeryville CA

International Classification:

G01N 27/414

US Classification:

257414, 600353

Abstract:

A system for measuring an analyte of interest, particularly carbon dioxide, dissolved in a fluid media of a patient including a nanoelectronic sensor and a measurement instrument in communication with the sensor and configured to receive at least a signal from the sensor indicative of a response of the sensor to at least the analyte of interest.

US Patent:

7937284, May 3, 2011

Filed:

Oct 18, 2002

Appl. No.:

10/273538

Inventors:

Daniel T. Chang - Belmont CA, US
Alexander Goldstein - Foster City CA, US
Yucheng Hu - Redwood City CA, US
Ying Wang - San Mateo CA, US
Pasan Rukmal Sirisena - San Mateo CA, US
Steve Apfelberg - Menlo Park CA, US
Marc Verbeek - Foster City CA, US
John J. Jakubik - Menlo Park CA, US
David Faibish - Foster City CA, US
Jie Liu - Redwood City CA, US
Tarri Furlong - San Leandro CA, US
Ashley Stirrup - Burlingame CA, US
Ajay Sabhlok - Fremont CA, US
Martin Renaud - San Carlos CA, US

Assignee:

Siebel Systems, Inc. - San Mateo CA

International Classification:

G05B 19/418
G06F 9/46

US Classification:

705 8

Abstract:

A method, system, and article of manufacture for defining and managing time-based organization hierarchies are disclosed herein. In one embodiment, a user interface, including a plurality of user interface displays configured to receive a user input to define and/or manage one or more instances of a time-based organization hierarchy, may be generated on a client. The user may then define, via interaction with the user interface, the at least one instance of the organization hierarchy to include a plurality of nodes, and specify an effective period for the instance of the time-based organization hierarchy by defining a start date and an end date. The user may also define a territory to correspond to each of the plurality of nodes in the organization hierarchy. In one embodiment, the territory may include at least one position and an assignment rule, the position having a corresponding quota.