Michael Chen

US Patent:

7147641, Dec 12, 2006

Filed:

May 30, 2001

Appl. No.:

09/866841

Inventors:

Michael C. Chen - King of Prussia PA, US

International Classification:

A61B 17/56

US Classification:

606 72, 606104

Abstract:

The invention relates to a device for attaching fixation elements to bone, having a longitudinal member with a channel extending therein adapted for receiving at least one fixation element. A shaft extends within the channel and is positioned coaxially within at least a portion of the longitudinal member and at least a portion of the shaft is retained within the longitudinal member and a distal end of the shaft is configured and adapted to contact at least a portion of the fixation element received within the longitudinal member. The longitudinal member is moveable with respect to the shaft to drive the fixation element into bone.

US Patent:

7522365, Apr 21, 2009

Filed:

Apr 12, 2005

Appl. No.:

11/103900

Inventors:

Michael Chen - Westminster CO, US

Assignee:

Maxtor Corporation - Scotts Valley CA

International Classification:

G11B 5/09
G11B 27/36
G11B 5/03
G11B 5/58

US Classification:

360 53, 360 31, 360 66, 360 7701

Abstract:

A magnetic storage system includes a disk, a head, an actuator, a read channel, and a main controller. The main controller causes the head to read a data block of a selected track of the disk at each of a plurality of fixed offsets from a center of the selected track. The main controller samples a gain in the read channel a plurality of times while the head is reading the data block at each of the plurality of fixed offsets to obtain a plurality of gain samples for each of the plurality of fixed offsets. If the data block was written off-track with a non-constant offset, the main controller determines an approximate starting position and an approximate rate of change of an off-track deviation of the data block based on the plurality of gain samples for the plurality of fixed offsets.

US Patent:

7634706, Dec 15, 2009

Filed:

Jul 5, 2006

Appl. No.:

11/481078

Inventors:

Michael H. Chen - Westminster CO, US
Rajita Shrestha - Westminster CO, US
James C. Alexander - Boulder CO, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

H03M 13/43

US Classification:

714760

Abstract:

A system for enhancing the error correction capability of an error correction code (“ECC”) during error recovery operations accumulates, for respective bits, counts of the number of times the bits are detected as 1s in multiple re-reads of a data signal. The system then determines, based on the associated count, if a reconstructed bit should be considered a 1 or 0, or neither, that is, if the reconstructed bit should be considered erroneous, by comparing the count to a majority detection threshold and then to either an upper or a lower predetermined threshold that corresponds to the confidence with which the bit is reconstructed as a either a 1 or a 0. If the confidence is sufficiently low, that is, if the count falls below the upper threshold or above the lower threshold, the reconstructed bit is flagged as erroneous. After all of the bits are reconstructed, the system groups the bits into symbols to reproduce the ECC codeword, and sets erasure pointers that identify the locations of a predetermined number, s, of the symbols that are associated with the highest degree of uncertainty, that is, the largest numbers of flagged bits or, as appropriate, the largest numbers of flagged bits with the lowest confidence levels. The error correction operation then decodes the symbols in the identified locations as erasures.

US Patent:

7653920, Jan 26, 2010

Filed:

Jan 24, 2005

Appl. No.:

11/041655

Inventors:

Michael A. Chen - Wallingford PA, US

Assignee:

Comcast Cable Communications, LLC - Philadelphia PA

International Classification:

H04H 60/33
H04H 60/32
H04N 7/167
H04L 9/00

US Classification:

725 9, 725 14, 725 31, 380264

Abstract:

A television program ratings method and system includes transferring information associated with households from a cable provider to a ratings provider such that the ratings provider has access to information associated with sampled households and lacks access to information associated with non-sampled households. To this end, identity information and usage information associated with the households are respectively anonymized and encrypted. Knowledge of the identities of the sampled households enables the anonymized identity information and the encrypted usage information for the sampled households to be respectively de-anonymized and decrypted. The ratings provider knows which households are sampled households. As such, the ratings provider de-anonymizes and decrypts the information associated with the sampled households and then uses the de-anonymized and decrypted information to determine television program ratings. The cable provider anonymizes and encrypts the information for all households as the cable provider does not know which households are sampled households.

US Patent:

7680061, Mar 16, 2010

Filed:

Apr 7, 2005

Appl. No.:

11/100881

Inventors:

Walter F. Michel - Glenside PA, US
Michael A. Chen - Wallingford PA, US

Assignee:

Comcast Cable Holdings, LLC - Philadelphia PA

International Classification:

G01R 31/08
H04L 12/28
H04N 7/16
H04N 7/173

US Classification:

370252, 370431, 725 25, 725114

Abstract:

A system and method for identifying which signals provided by a head-end are accessible to CPE of a subscriber in an HFC network. The method includes obtaining a partial list of signals accessible to the CPE, and then applying heuristic rules on the partial list to generate a complete accessible signal list. Obtaining the partial list includes discovering signal information regarding a subset of the signals which are accessible to the CPE; using the discovered signal information to obtain a signal identification of a signal accessible to the CPE; and generating the partial list based on the obtained signal identification. Applying a heuristic rule includes using a bit mask within the obtained signal identification or a naming convention of the obtained signal identification to identify other associated signals. The partial list is then generated based on the obtained signal identification and the signal identifications of the other associated signals.

US Patent:

7958523, Jun 7, 2011

Filed:

Dec 18, 2009

Appl. No.:

12/641923

Inventors:

Michael A Chen - Wallingford PA, US

Assignee:

Comcast Cable Communications, LLC - Philadelphia PA

International Classification:

H04H 60/33
H04H 60/32
H04N 7/167
H04L 9/00

US Classification:

725 9, 725 14, 725 31, 380264

Abstract:

A television program ratings method and system includes transferring information associated with households from a cable provider to a ratings provider such that the ratings provider has access to information associated with sampled households and lacks access to information associated with non-sampled households. To this end, identity information and usage information associated with the households are respectively anonymized and encrypted. Knowledge of the identities of the sampled households enables the anonymized identity information and the encrypted usage information for the sampled households to be respectively de-anonymized and decrypted. The ratings provider knows which households are sampled households. As such, the ratings provider de-anonymizes and decrypts the information associated with the sampled households and then uses the de-anonymized and decrypted information to determine television program ratings. The cable provider anonymizes and encrypts the information for all households as the cable provider does not know which households are sampled households.

US Patent:

8052691, Nov 8, 2011

Filed:

Nov 18, 2004

Appl. No.:

10/992259

Inventors:

Ralph Fritz Zwirnmann - Roslyn PA, US
Michael C. Chen - King of Prussia PA, US

Assignee:

Synthes USA, LLC - West Chester PA

International Classification:

A61F 2/46

US Classification:

606 86R, 606104

Abstract:

The invention relates to a device for attaching fixation elements to bone, having a longitudinal member with a channel extending therein adapted for receiving at least one fixation element. A shaft extends within the channel and is positioned coaxially within at least a portion of the longitudinal member and at least a portion of the shaft is retained within the longitudinal member and a distal end of the shaft is configured and adapted to contact at least a portion of the fixation element received within the longitudinal member. A spring is positioned adjacent the shaft for resiliently biasing the shaft in an axial direction and the shaft is moveable with respect to the longitudinal member to drive the fixation element into bone.

US Patent:

8059353, Nov 15, 2011

Filed:

Aug 25, 2008

Appl. No.:

12/197508

Inventors:

Michael Chen - Westminster CO, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5/09
G11B 27/36
G11B 5/03
G11B 5/58

US Classification:

360 53, 360 31, 360 66, 360 7701

Abstract:

A magnetic storage system includes a disk, a head, an actuator, a read channel, and a main controller. The main controller causes the head to read a data block of a selected track of the disk at each of a plurality of fixed offsets from a center of the selected track. The main controller samples a gain in the read channel a plurality of times while the head is reading the data block at each of the plurality of fixed offsets to obtain a plurality of gain samples for each of the plurality of fixed offsets. If the data block was written off-track with a non-constant offset, the main controller determines an approximate starting position and an approximate rate of change of an off-track deviation of the data block based on the plurality of gain samples for the plurality of fixed offsets.

Address:

831 44 St, Brooklyn, NY 11220

VIN:

2HKYF185X7H511560

Make:

HONDA

Model:

PILOT

Year:

2007