David S Wu

US Patent:

20080100631, May 1, 2008

Filed:

Oct 10, 2007

Appl. No.:

11/870199

Inventors:

Doug Grearson - Andover MA, US
Glenn Giacalone - Andover MA, US
David Wu - San Diego CA, US
Tim Hellman - Concord MA, US
Chris Payson - Bolton MA, US
Reinhard Schumann - Exeter NH, US

International Classification:

G06F 13/14
G06F 15/00

US Classification:

345519, 345501, 345522

Abstract:

In one embodiment, there is presented an integrated circuit. The integrated circuit comprises a transport processor and a host processor. The transport processor parses a media stream. The host processor determines whether a media stream is Blu-ray or HD-DVD and configures the transport processor based on whether the media stream is Blu-ray or HD-DVD.

US Patent:

20230090575, Mar 23, 2023

Filed:

Mar 21, 2022

Appl. No.:

17/699894

Inventors:

- Needham MA, US
Adam UDY - Sutton, GB
Catriona A. SUTTER - London, GB
Christopher PINCHES - Surrey, GB
David S. CLARE - London, GB
Andre David BROWN - Natick MA, US
John FREESE - Newton MA, US
Patrick CLEARY - Allston MA, US
Alexander CALVINO - Newton MA, US
Lee COTTRELL - Newton MA, US
Daniel MEYER - Boston MA, US
Daniel John INNES - West Roxbury MA, US
David JALBERT - Newton MA, US
Jason THORNE - Wellesley Hills MA, US
Peter HUTCHINSON - Suzhou, CN
Gordon HOWES - Newton MA, US
Nancy GAO WENXIU - Suzhou, CN
David WU - Newton MA, US
David W. POIRER - Lexington MA, US

International Classification:

A47L 9/04
A47L 5/26
A47L 5/30
A47L 9/30
A47L 9/06

Abstract:

A surface cleaning head with dual rotating agitators (e.g., a leading roller and a brush roll) may be used to facilitate capturing of debris in the air flow into a suction conduit on the underside of the surface cleaning head. The leading roller is generally positioned adjacent to and in advance of the opening of the suction conduit. The rotating brush roll may be located in the suction conduit with the leading roller located in front of and spaced from the brush roll, forming an inter-roller air passageway therebetween. The leading roller may provide a softer cleaning element than the brush roll and may also have an outside diameter that is less than the outside diameter of the brush roll. The surface cleaning head may also include debriding protrusions contacting the leading roller and/or a leading bumper that extends in front of the leading roller.

US Patent:

20230017092, Jan 19, 2023

Filed:

Jul 15, 2022

Appl. No.:

17/866213

Inventors:

- Coopersburg PA, US
David C. Wu - Malden MA, US

Assignee:

Lutron Technology Company LLC - Coopersburg PA

International Classification:

H02M 1/32
H02M 3/335
H02M 1/00
H02M 1/08

Abstract:

A power supply may include a power converter circuit may be configured to control a magnitude of an output voltage, and generate a signal indicative of the magnitude of the output voltage. The power supply may include an over-power protection circuit that is configured to receive a feedback signal indicative of a magnitude of an input current of the power converter circuit. The power supply may include a control circuit that is configured to determine a magnitude of a requested power based on the signal indicative of the magnitude of the output voltage, and disable the power supply (e.g., control the magnitude of the output voltage to be zero volts) when the magnitude of the requested power is greater than a second threshold and the magnitude of input power indicated by the first feedback signal is less than a third threshold.

US Patent:

20210398611, Dec 23, 2021

Filed:

Feb 1, 2021

Appl. No.:

17/164235

Inventors:

Hyunghoon Cho - Cambridge MA, US
Bonnie Berger Leighton - Newton MA, US
David J. Wu - Stanford CA, US

International Classification:

G16B 20/20
G16B 20/00
G16B 30/00
G16B 50/30
G16B 20/40

Abstract:

Computationally-efficient techniques facilitate secure crowdsourcing of genomic and phenotypic data, e.g., for large-scale association studies. In one embodiment, a method begins by receiving, via a secret sharing protocol, genomic and phenotypic data of individual study participants. Another data set, comprising results of pre-computation over random number data, e.g., mutually independent and uniformly-distributed random numbers and results of calculations over those random numbers, is also received via secret sharing. A secure computation then is executed against the secretly-shared genomic and phenotypic data, using the secretly-shared results of the pre-computation over random number data, to generate a set of genome-wide association study (GWAS) statistics. For increased computational efficiency, at least a part of the computation is executed over dimensionality-reduced genomic data. The resulting GWAS statistics are then used to identify genetic variants that are statistically-correlated with a phenotype of interest.

US Patent:

20180373834, Dec 27, 2018

Filed:

Jun 27, 2018

Appl. No.:

16/020058

Inventors:

Hyunghoon Cho - Cambridge MA, US
Bonnie Berger Leighton - Newton MA, US
David J. Wu - Stanford CA, US

International Classification:

G06F 19/18
G06F 19/22

Abstract:

Computationally-efficient techniques facilitate secure crowdsourcing of genomic and phenotypic data, e.g., for large-scale association studies. In one embodiment, a method begins by receiving, via a secret sharing protocol, genomic and phenotypic data of individual study participants. Another data set, comprising results of pre-computation over random number data, e.g., mutually independent and uniformly-distributed random numbers and results of calculations over those random numbers, is also received via secret sharing. A secure computation then is executed against the secretly-shared genomic and phenotypic data, using the secretly-shared results of the pre-computation over random number data, to generate a set of genome-wide association study (GWAS) statistics. For increased computational efficiency, at least a part of the computation is executed over dimensionality-reduced genomic data. The resulting GWAS statistics are then used to identify genetic variants that are statistically-correlated with a phenotype of interest.

US Patent:

20180338656, Nov 29, 2018

Filed:

May 23, 2018

Appl. No.:

15/987589

Inventors:

- Needham MA, US
Adam UDY - Sutton, GB
Catriona A. SUTTER - Brookline MA, US
Christopher PINCHES - Surrey, GB
David S. CLARE - London, GB
Andre David BROWN - Natick MA, US
John FREESE - Chestnut Hill MA, US
Patrick CLEARY - Allston MA, US
Alexander J. CALVINO - Needham MA, US
Lee COTTRELL - Newton MA, US
Daniel MEYER - Boston MA, US
Daniel John INNES - West Roxbury MA, US
David JALBERT - Needham MA, US
Jason B. THORNE - Wellesley Hills MA, US
Peter HUTCHINSON - Suzhou, CN
Gordon HOWES - Suzhou, CN
Wenxiu GAO - Suzhou, CN
David WU - Needham MA, US
David W. POIRIER - Lexington MA, US
Daniel R. DER MARDEROSIAN - Westwood MA, US

International Classification:

A47L 9/06
A47L 5/30
A47L 9/04

Abstract:

A robotic cleaner includes a housing, a suction conduit with an opening, and a leading roller mounted in front of a brush roll. An inter-roller air passageway may be defined between the leading roller and the brush roll wherein the lower portion of the leading roller is exposed to a flow path to the suction conduit and an upper portion of the leading roller is outside of the flow path. Optionally, a combing unit includes a plurality of combing protrusions extending into the leading roller and having leading edges not aligned with a center of the leading roller. Optionally, a sealing strip is located along a rear side of the opening and along a portion of left and right sides of the opening. The underside may define side edge vacuum passageways extending from the sides of the housing partially between the leading roller and the sealing strip towards the opening.

US Patent:

20170347848, Dec 7, 2017

Filed:

Aug 24, 2017

Appl. No.:

15/685456

Inventors:

- Newton MA, US
Adam UDY - Sutton, GB
Catriona A. SUTTER - London, GB
Christopher PINCHES - Surrey, GB
David S. CLARE - London, GB
Andre David BROWN - Natick MA, US
John FREESE - Newton MA, US
Patrick CLEARY - Allston MA, US
Alexander CALVINO - Newton MA, US
Lee COTTRELL - Newton MA, US
Daniel MEYER - Boston MA, US
Daniel John INNES - West Roxbury MA, US
David JALBERT - Newton MA, US
Jason THORNE - Wellesley Hills MA, US
Peter HUTCHINSON - Suzhou, CN
Gordon HOWE - Newton MA, US
Nancy GAO WENXIU - Suzhou, CN
David WU - Newton MA, US
David W. POIRIER - Lexington MA, US
Daniel R. DER MARDEROSIAN - Westwood MA, US

International Classification:

A47L 5/30
A47L 9/04

Abstract:

A surface cleaning head includes dual rotating agitators (e.g., a leading roller and a brush roll) and a removable cover for covering a top of the agitators and allowing access to the agitators from a top of the surface cleaning head. The dual agitators may be used to facilitate capturing of debris in the air flow into a suction conduit on the underside of the surface cleaning head. The brush roll may be located in a brush roll chamber and at least partially in an opening to the suction conduit. The leading roller may be positioned adjacent to and in advance of the suction conduit opening such that the leading roller engages debris and moves the debris toward the brush roll and the opening. The leading roller may be removable from the housing and held in place by the removable cover. The cover may be coupled using isolated latching mechanisms.

US Patent:

20170215667, Aug 3, 2017

Filed:

Apr 20, 2017

Appl. No.:

15/492320

Inventors:

- Newton MA, US
Yao MING - Newton MA, US
Daniel R. DER MARDEROSIAN - Westwood MA, US
Daniel MEYER - Boston MA, US
Patrick CLEARY - Allston MA, US
Gordon HOWE - Suzhou, CN
David WU - Newton MA, US
Nancy GAO WENXIU - Suzhou, CN

International Classification:

A47L 9/06
A47L 5/30
A47L 9/04
A47L 5/26

Abstract:

A cleaning apparatus includes a combing unit including a series of spaced protrusions or teeth extending into a cleaning roller for preventing build up and removing debris (such as hair, string, and the like). The protrusions extend along a substantial portion of the cleaning roller and extend partially into the cleaning roller to intercept the debris as it passes around the roller. The protrusions have angled leading edges that are not aligned with a rotation center of the cleaning roller and are directed into or against a direction of rotation of the cleaning roller. The combing unit and protrusions have a shape and configuration designed to facilitate debris removal from the cleaning roller with minimal impact on the operation of the cleaning apparatus. The cleaning apparatus may include a surface cleaning head of an upright vacuum cleaner or sweeper or a robotic vacuum cleaner.