Michael E Chang

US Patent:

8576506, Nov 5, 2013

Filed:

Jun 21, 2012

Appl. No.:

13/529817

Inventors:

Honge Wang - Irvine CA, US
Michael Chang - San Jose CA, US
Abhishek Dhanda - San Jose CA, US
Huanxiang Ruan - Irvine CA, US
Guoxiao Guo - Irvine CA, US

Assignee:

Western Digital Technologies, Inc. - Irvine CA

International Classification:

G11B 5/09

US Classification:

360 50, 360 51, 360 39, 360 7708

Abstract:

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones. A disk locked clock is synchronized relative to a servo data rate of the servo zone the head is over. A first reader/writer gap is measured in cycles of the disk locked clock at a first servo track in the first servo zone. A second reader/writer gap is measured in cycles of the disk locked clock at a second servo track in the second servo zone. The first and second reader/writer gaps are normalized to generate a normalized first and second reader/writer gaps. A third reader/writer gap is estimated in cycles of the disk locked clock at a third servo track in the second servo zone based on the normalized first and second reader/writer gaps.

US Patent:

20040043682, Mar 4, 2004

Filed:

Sep 4, 2002

Appl. No.:

10/236053

Inventors:

Steven Taylor - Glendora CA, US
Mark Longfellow - Foothill Ranch CA, US
Norman Tracy - Huntington Beach CA, US
Robert Henderson - Tustin CA, US
Michael Chang - Irvine CA, US
Roland Weber - Rancho Palos Verdes CA, US

International Classification:

B32B027/12
B32B013/02
B32B013/14
B32B005/02
B32B027/04

US Classification:

442/042000, 442/043000, 442/045000, 442/049000

Abstract:

A composite board for use as backerboard for tile, the board including a mesh layer with a mesh fabric, a mat layer with a mat fabric and a polystyrene layer disposed between the two portions where a non-shrinking cement compound saturates and connects the two outer portions with the polystyrene substrate. The composite board's mesh layer incorporates a stretchable mesh which in conjunction with the polystyrene substrate and the non-shrinking cement compound supports standard fasteners used in the home-building industry along with providing a suitable tile adhesion surface. The mat layer incorporates a fiberglass mat which provides high rigidity as well as being suitable for contact with an inner wall or studs. The combination of materials provides a backerboard that is light weight, rigid, economical and easy to build with.

US Patent:

20060183387, Aug 17, 2006

Filed:

Dec 14, 2005

Appl. No.:

11/304987

Inventors:

Steven Taylor - Glendora CA, US
Mark Longfellow - Foothill Ranch CA, US
Norman Tracy - Huntington Beach CA, US
Robert Henderson - Tustin CA, US
Michael Chang - Irvine CA, US
Roland Weber - Rancho Palos Verdes CA, US

International Classification:

B32B 5/24

US Classification:

442030000, 442035000, 442042000, 442043000, 442045000, 442046000, 442048000, 442049000, 442164000, 442180000, 428304400, 428318400, 442370000, 442221000

Abstract:

A composite board for use as backerboard for tile includes outer reinforcement portions and a polystyrene layer disposed between the two outer reinforcement portions, at least one of the outer reinforcement portions being an outer mat fabric reinforcement layer with a mat fabric, and a non-shrinking cement compound saturating and connecting the two outer portions with the polystyrene substrate. A method of installing a composite tile backerboard involves placing the composite board against a fixture protruding from a flat surface, pressing the composite board against the fixture to emboss the features of the fixture on the surface of the composite board, and cutting a hole in the composite board based upon the features of the fixture embossed on the composite board.

US Patent:

20210297406, Sep 23, 2021

Filed:

Oct 4, 2016

Appl. No.:

15/284947

Inventors:

- San Francisco CA, US
Abhijit Rao - Irvine CA, US
Byron G. Chun - Daly City CA, US
Samuel B. Martin - San Francisco CA, US
Michael H. Chang - Millbrae CA, US
Traci H. Nguyen - San Francisco CA, US
Douglas S. Pelton - Richmond CA, US

International Classification:

H04L 29/06

Abstract:

A system includes at least one hardware processor in communication with a first computing device of a suspect party and a second computing device of an inquiring party, the suspect party being targeted for trust evaluation by the inquiring party, and a memory storing instructions that, when executed by the at least one hardware processor, cause the at least one hardware processor to perform operations. The operations include receiving, from the second computing device, a request to perform a trust evaluation of the suspect party, the request including a permission token, identifying the suspect party based on the permission token, generating a trust result for the suspect party based on financial data associated with the suspect party, the trust result indicating an assessed level of trustworthiness of the suspect party, and transmitting the trust result to the second computing device for display to the inquiring party.