William W Chang

US Patent:

6577705, Jun 10, 2003

Filed:

Apr 2, 2001

Appl. No.:

09/824268

Inventors:

William Chang - Newark CA 94560
Xiao-Dong Xiang - Alameda CA 94502
Edward D. Franco - San Mateo CA 94402

International Classification:

G01N 23223

US Classification:

378 45, 378 71, 378 83

Abstract:

Method and system for analyzing local composition and structure of a compound having one or more non-zero gradients in concentration for one or more selected constituents in a selected direction. A beam of X rays having representative energy E is received by a mono-capillary or poly-capillary device and is directed at a selected small region of the compound. A portion of the X rays is diffracted at the selected region by one or more constituents of the compound, at each of two or more diffraction angles relative to a selected surface or lattice plane(s) of the compound; and the diffracted portion of X rays for each of these diffraction angles is received and analyzed at an X-ray detector. A portion of the X rays excites fluorescence radiation that is received by a fluorescence detector to estimate the relative concentrations in a compound having two or more constituents. Fluorescence X rays and diffraction X rays can be detected at each desired translational position and rotation for a target site. As a result, a concentration map for various constituents in the compound can be prepared, together with a phase map illustrating the structure of a combinatorial compound.

US Patent:

8633823, Jan 21, 2014

Filed:

May 16, 2010

Appl. No.:

12/780910

Inventors:

William Chang - Newark CA, US
Edward D. Franco - San Mateo CA, US
Joseph Bendahan - San Jose CA, US
Jolyon A. Browne - San Jose CA, US

Assignee:

Rapiscan Systems, Inc. - Torrance CA

International Classification:

G08B 17/12
G01N 23/06
G01N 23/04
G21K 7/00

US Classification:

340600, 378 53, 378 57, 250308

Abstract:

The present invention is directed to an inspection system that has a radiation source, a detector array, an inspection region, and a processing unit, where the processing unit a) obtains a radiographic image, b) segments the radiographic image based on radiation attenuation or transmission, c) identifies at least one segmented area on the radiographic image, d) filters the at least one segmented area using at least one geometric filter, e) generates feature vectors using the filtered segmented area; and f) compares the feature vectors against predefined values to determine whether a high-atomic-number object is present.

US Patent:

20180221005, Aug 9, 2018

Filed:

Apr 3, 2018

Appl. No.:

15/944320

Inventors:

Andrew J. HAMEL - Portola Valley CA, US
Michael D. BAYCURA - San Francisco CA, US
Michael G. HILLDOERFER - San Jose CA, US
Vasudev NAMBAKAM - San Jose CA, US
Salmaan HAMEED - San Jose CA, US
William H.L. CHANG - Milpitas CA, US

International Classification:

A61B 17/00
G08C 17/02
A61B 17/32
A61B 90/70
A61B 18/14

Abstract:

A wireless foot control apparatus allows an operator to control multiple medical devices during an endoscopic medical procedure. The apparatus comprises a control console with controls designed for foot operation to control various medical devices. The controls include one or more foot pedals and foot switches to control the devices, including a selection switch to allow selection of the device to be controlled at a particular time. The console transmits signals over a wireless medium, to cause a remote receiver unit to select the device to be controlled and to control the selected device over a wired medium, in response to operation of the foot controls. The console may include a rechargeable battery, which may be sealed within the console's housing and charged inductively when the console is placed in a charging station. The receiver unit and the charging station can be separate units or integrated within a single housing.

US Patent:

20170352344, Dec 7, 2017

Filed:

Feb 9, 2017

Appl. No.:

15/428828

Inventors:

- Berkeley CA, US
William Hui-Dee Chang - San Leandro CA, US
David Leo Wright Hall - Berkeley CA, US
Daniel Klein - Orinda CA, US

Assignee:

Semantic Machines, Inc. - Berkeley CA

International Classification:

G10L 13/10
G10L 13/033
G10L 13/027

Abstract:

The intonation model of the present technology disclosed herein assigns different words within a sentence to be prominent, analyzes multiple prominence possibilities (in some cases, all prominence possibilities), and learns parameters of the model using large amounts of data. Unlike previous systems, intonation patterns are discovered from data. Speech data is sub-segmented into words, the different segments are analyzed and used for learning, and a determination is made as to whether the segmentations predict pitch

US Patent:

20170273673, Sep 28, 2017

Filed:

Jun 9, 2017

Appl. No.:

15/618861

Inventors:

Andrew J. HAMEL - Portola Valley CA, US
Michael D. BAYCURA - San Francisco CA, US
Michael G. HILLDOERFER - San Jose CA, US
Vasudev NAMBAKAM - San Jose CA, US
Salmaan HAMEED - San Jose CA, US
William H.L. CHANG - Milpitas CA, US

International Classification:

A61B 17/00
G08C 17/02
A61B 17/32

Abstract:

A wireless foot control apparatus allows an operator to control multiple medical devices during an endoscopic medical procedure. The apparatus comprises a control console with controls designed for foot operation to control various medical devices. The controls include one or more foot pedals and foot switches to control the devices, including a selection switch to allow selection of the device to be controlled at a particular time. The console transmits signals over a wireless medium, to cause a remote receiver unit to select the device to be controlled and to control the selected device over a wired medium, in response to operation of the foot controls. The console may include a rechargeable battery, which may be sealed within the console's housing and charged inductively when the console is placed in a charging station. The receiver unit and the charging station can be separate units or integrated within a single housing.

US Patent:

20170220636, Aug 3, 2017

Filed:

Apr 17, 2017

Appl. No.:

15/488852

Inventors:

- Mountain View CA, US
Keith Patrick Golden - San Francisco CA, US
Ben Hutchinson - San Francisco CA, US
William Chang - San Francisco CA, US

International Classification:

G06F 17/30

Abstract:

A system for automatically updating saved query results for a graph responsive to a graph update is disclosed. The system may identify a target constraint responsive to an update to the data graph. The system may use an index of constraints organized by edge. The target constraint specifies a path in a data graph that includes an edge specified in the update. The system may determine a state for the target constraint by traversing the graph via the path and determine based on the state, whether a member node represents a change to the saved query result. The system may then update a saved query result for the query using the member node identified during the traversal in accordance with the change.

US Patent:

20160349397, Dec 1, 2016

Filed:

Dec 12, 2013

Appl. No.:

14/104625

Inventors:

- Torrance CA, US
William Chang - Newark CA, US
Edward D. Franco - San Mateo CA, US
Joseph Bendahan - San Jose CA, US
Jolyon A. Browne - San Jose CA, US

Assignee:

Rapiscan Systems, Inc. - Torrance CA

International Classification:

G01V 5/00
G06K 9/46

Abstract:

The present invention is directed to an inspection system that has a radiation source, a detector array, an inspection region, and a processing unit, where the processing unit a) obtains a radiographic image, b) segments the radiographic image based on radiation attenuation or transmission, c) identifies at least one segmented area on the radiographic image, d) filters the at least one segmented area using at least one geometric filter, e) generates feature vectors using the filtered segmented area; and f) compares the feature vectors against predefined values to determine whether a high-atomic-number object is present.

US Patent:

20160134935, May 12, 2016

Filed:

Jan 15, 2016

Appl. No.:

14/997215

Inventors:

- Santa Clara CA, US
WILLIAM H. Chang - Fremont CA, US
Sherman Tuan - Cupertino CA, US

International Classification:

H04N 21/454
H04N 21/2668
H04N 21/45
H04N 21/44
H04N 21/442
H04N 21/234
H04N 21/81

Abstract:

Media system control technology, in which an advertisement on a selected content channel being experienced by a user using a media system is detected, advertisement preferences of the user are accessed from electronic storage, and secondary content is selected based on the accessed advertisement preferences of the user. The secondary content is substituted for the advertisement on the selected content channel, and the media system is controlled to output the secondary content instead of the advertisement.