Wei Keat Chai from 27917 Edgecliff Way, Hayward, CA 94542, age 48

Us Patents

Dual Stage Actuator Suspension Having A Single Microactuator And Employing Pseudo Symmetry To Achieve Suspension Balance
view source
US Patent:

8228642, Jul 24, 2012
Filed:

Feb 16, 2010
Appl. No.:

12/705980
Inventors:

Peter Hahn - Wildomar CA, US
Wei Keat Chai - Temecula CA, US
Kuen Chee Ee - Murietta CA, US
Assignee:

Magnecomp Corporation - Murrieta CA
International Classification:

G11B 21/24
G11B 5/596
US Classification:

3602944, 3602445
Abstract:

A dual stage actuator (DSA) suspension has a single microactuator such as a PZT element on one side of central longitudinal axis of the suspension, and a pseudo symmetry structure formed or affixed on the other side of the central longitudinal axis opposite the PZT. The pseudo symmetry structure has mass and stiffness that mirrors the PZT, thus keeping the suspension mechanically balanced and symmetric about the longitudinal axis for improved suspension performance especially in a shock environment.

Hard Disk Drive Suspension With Reduced Psa Change Due To Humidity And Temperature Variations
view source
US Patent:

8441761, May 14, 2013
Filed:

Jan 3, 2011
Appl. No.:

12/983613
Inventors:

Peter Hahn - Wildomar CA, US
Wei Keat Chai - San Jose CA, US
Kuen Chee Ee - Chino CA, US
Assignee:

Magnecomp Corporation - Murrieta CA
International Classification:

G11B 5/60
G11B 21/21
US Classification:

3602459, 3602453
Abstract:

In a disk drive suspension circuit, in order to improve stability of the stable pitch static attitude (PSA) over changes in humidity, the suspended portion of the flexible circuit and/or the gimbal support arm are modified to change their response(s) to humidity. In one embodiment, hygroscopic material such as the material of the insulating layer are added to the stainless steel gimbal support arm, so that in response to humidity it bends in the opposite direction as the suspended portion of the circuit. In another embodiment, additional hygroscopic material is added to the circuit, and/or the polyimide insulating layer or the coverlayer are selectively removed, so that the net bend in the suspended portion of the circuit over humidity is reduced, ideally to a condition of zero or close to zero net bending.

Dual Stage Actuator Suspension Having A Single Microactuator And Employing Pseudo Symmetry To Achieve Suspension Balance
view source
US Patent:

8559138, Oct 15, 2013
Filed:

Jun 22, 2012
Appl. No.:

13/530522
Inventors:

Peter Hahn - Wildomar CA, US
Wei Keat Chai - Temecula CA, US
Kuen Chee Ee - Murietta CA, US
Assignee:

Magnecomp Corporation - Murrieta CA
International Classification:

G11B 21/24
G11B 5/596
US Classification:

3602944, 3602445
Abstract:

A dual stage actuator (DSA) suspension has a single microactuator such as a PZT element on one side of central longitudinal axis of the suspension, and a pseudo symmetry structure formed or affixed on the other side of the central longitudinal axis opposite the PZT. The pseudo symmetry structure has mass and stiffness that mirrors the PZT, thus keeping the suspension mechanically balanced and symmetric about the longitudinal axis for improved suspension performance especially in a shock environment.

Document Processing Using Retrieval Path Data
view source
US Patent:

20110218883, Sep 8, 2011
Filed:

Mar 3, 2010
Appl. No.:

12/717088
Inventors:

Daniel-Alexander Billsus - San Francisco CA, US
Wei Chai - Union City CA, US
Sam P. Hamilton - Los Altos CA, US
Jonathan Blake Handler - Redwood City CA, US
Nir Yeffet - Cupertino CA, US
International Classification:

G06F 17/30
G06Q 30/00
US Classification:

705 271, 707771, 707E17014, 705 2625
Abstract:

The browsing activity of a first user is motivated by some intent. The first user requests retrieval of a particular document while browsing. A document processing and presentation machine associates the document with a retrieval path taken by the first user. By using the retrieval path data of the document, the document processing and presentation machine infers an intent that likely motivated the first user. When a second user makes a request similar to a request within the retrieval path, the machine presents the second user with the document and some of the retrieval path data, thus providing the second user with a shortcut that leads the second user directly to the document. Thus, the second user may be able to satisfy his intent with significantly less browsing activity compared to the first user.

Document Processing Using Retrieval Path Data
view source
US Patent:

20110219029, Sep 8, 2011
Filed:

Mar 3, 2010
Appl. No.:

12/717082
Inventors:

Daniel-Alexander Billsus - San Francisco CA, US
Wei Chai - Union City CA, US
Sam P. Hamilton - Los Altos CA, US
Jonathan Blake Handler - Redwood City CA, US
Nir Yeffet - Cupertino CA, US
International Classification:

G06F 17/30
G06F 15/16
G06Q 30/00
US Classification:

707770, 709203, 707E17107, 705 271, 705 261
Abstract:

The browsing activity of a first user is motivated by some intent. The first user requests retrieval of a particular document while browsing. A document processing and presentation machine associates the document with a retrieval path taken by the first user. By using the retrieval path data of the document, the document processing and presentation machine infers an intent that likely motivated the first user. When a second user makes a request similar to a request within the retrieval path, the machine presents the second user with the document and some of the retrieval path data, thus providing the second user with a shortcut that leads the second user directly to the document. Thus, the second user may be able to satisfy his intent with significantly less browsing activity compared to the first user.

Document Presentation Using Retrieval Path Data
view source
US Patent:

20110219030, Sep 8, 2011
Filed:

Mar 3, 2010
Appl. No.:

12/717091
Inventors:

Daniel-Alexander Billsus - San Francisco CA, US
Wei Chai - Union City CA, US
Sam P. Hamilton - Los Altos CA, US
Jonathan Blake Handler - Redwood City CA, US
Nir Yeffet - Cupertino CA, US
International Classification:

G06F 17/30
G06F 15/16
G06F 17/00
G06Q 30/00
US Classification:

707770, 707E17108, 707E17008, 705 271
Abstract:

The browsing activity of a first user is motivated by some intent. The first user requests retrieval of a particular document while browsing. A document processing and presentation machine associates the document with a retrieval path taken by the first user. By using the retrieval path data of the document, the document processing and presentation machine infers an intent that likely motivated the first user. When a second user makes a request similar to a request within the retrieval path, the machine presents the second user with the document and some of the retrieval path data, thus providing the second user with a shortcut that leads the second user directly to the document. Thus, the second user may be able to satisfy his intent with significantly less browsing activity compared to the first user.

Low Profile Load Beam With Etched Cavity For Pzt Microactuator
view source
US Patent:

8149545, Apr 3, 2012
Filed:

Oct 20, 2009
Appl. No.:

12/582548
Inventors:

Wei Keat Chai - Temecula CA, US
Peter Hahn - Wildomar CA, US
Assignee:

Magnecomp Corporation - Murrieta CA
International Classification:

G11B 5/56
US Classification:

3602943
Abstract:

A dual-stage actuator disk drive suspension load beam has a recessed cavity formed in it into which the microactuator motor is partially or completely placed. The cavity may be formed by partially etching the load beam during the same etching process that creates the load beam from a sheet of stainless steel material. The partially etched load beam having a cavity for the microactuator motor has the advantages of a lower profile, improved inertial balancing of the suspension, and increased sway resonant frequency.

Wide And Deep Machine Learning Models
view source
US Patent:

20200372359, Nov 26, 2020
Filed:

Aug 12, 2020
Appl. No.:

16/991258
Inventors:

- Mountain View CA, US
Rohan Anil - San Francisco CA, US
Hrishikesh Balkrishna Aradhye - Mountain View CA, US
Mustafa Ispir - Mountain View CA, US
Glen Anderson - Palo Alto CA, US
Wei Chai - Cupertino CA, US
Mehmet Levent Koc - Mountain View CA, US
Jeremiah Joseph Harmsen - Zurich, CH
Xiaobing Liu - Sunnyvale CA, US
Gregory Sean Corrado - San Francisco CA, US
Tushar Deepak Chandra - Los Altos CA, US
International Classification:

G06N 3/08
G06N 3/04
Abstract:

A system includes one or more computers and one or more storage devices storing instructions that when executed by the one or more computers cause the computers to implement a combined machine learning model for processing an input including multiple features to generate a predicted output for the machine learning input. The combined model includes: a deep machine learning model configured to process the features to generate a deep model output; a wide machine learning model configured to process the features to generate a wide model output; and a combining layer configured to process the deep model output generated by the deep machine learning model and the wide model output generated by the wide machine learning model to generate the predicted output, in which the deep model and the wide model have been trained jointly on training data to generate the deep model output and the wide model output.