Zhong Hua Chen

Address:

26 Fairlawn Ln, Lexington, MA 02420

VIN:

5FNRL38739B015785

Make:

HONDA

Model:

ODYSSEY

Year:

2009

US Patent:

53768310, Dec 27, 1994

Filed:

Sep 24, 1993

Appl. No.:

8/126283

Inventors:

Zhong X. Chen - Framingham MA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H03K 1700
H03L 500

US Classification:

327379

Abstract:

A switch circuit controllably supplies initial current from a power supply to a load to prevent a current surge when the switch circuit is "hot-plugged" or when power is first applied to the switch circuit. The circuit comprises an output transistor having a first port for connection to a load, a second port for connection to the power supply and a third port for on/off control. A first resistor is connected between the second and third ports. A second resistor and a first capacitor are connected in series with each other between the first and third ports. The second resistor is large enough such that the transistor is biased off when the power supply is first connected to the second port. A timer changes the voltage at the third port a predetermined time after application of the power supply to the second port so as to bias the output transistor to begin a limited conduction of current between the first and second ports. This current increases in a controlled manner as the capacitor discharges until the output transistor is turned-on fully to supply operating current.

US Patent:

20190028349, Jan 24, 2019

Filed:

Jul 24, 2017

Appl. No.:

15/657716

Inventors:

- Arlington MA, US
Zhong Chen - Acton MA, US
Matthew J. Threefoot - Columbia MD, US

International Classification:

H04L 12/24
H04L 29/12

Abstract:

A network device stores capability designations associated with Internet-of-Things (IoT) devices and receives, from a customer device, one or more of the capability designations associated with a first type of IoT device. The network device receives event data generated by the first type of IoT device and maps the event data to the one or more of the capability designations. The mapping produces normalized IoT data for the first type of IoT device. The network device generates semantic information for the normalized IoT data and assembles a device model for the first type of IoT device. The device model includes the one or more of the capability designations and the semantic information.

US Patent:

20180212970, Jul 26, 2018

Filed:

Jan 20, 2017

Appl. No.:

15/410863

Inventors:

- Arlington VA, US
Zhong Chen - Acton MA, US
Lin Zhu - Lexington MA, US
Jianxiu Hao - Acton MA, US

International Classification:

H04L 29/06
H04L 9/08

Abstract:

A network device receives, from a node in an Internet-of-Things (IoT) network, an access request for a user authenticated via the node and identifies the access request as from either of a trusted node or an untrusted node in the IoT network. When the access request is from an untrusted node, the network device identifies a hash key for the access request, wherein the hash key is derived from an access list for the IoT network; broadcasts the hash key to other trusted nodes in the IoT network; and validates the access request based on a solution consensus from the other trusted nodes. When the access request is from a trusted node, the network device confirms mutual trust with the trusted node via an encrypted key exchange, and validates the access request based on the mutual trust with the trusted node.

US Patent:

20180102916, Apr 12, 2018

Filed:

Oct 7, 2016

Appl. No.:

15/288335

Inventors:

- Arlington VA, US
Jianxiu Hao - Acton MA, US
Zhong Chen - Acton MA, US
Dahai Ren - Lincoln MA, US

International Classification:

H04L 12/46
H04L 29/08
G06F 17/30

Abstract:

A network device receives a plurality of framework definitions corresponding to a respective plurality of device platforms, wherein each of the device platforms comprises at least one device. The network device generates a plurality of generalized framework definitions for each of the plurality of device platforms, wherein the plurality of generalized framework definitions comprise basic linguistic components corresponding to elements in the respective plurality of framework definitions. The network device receives data from the at least one device for each of the device platforms. The network device extracts data from the received data based on the plurality of generalized framework definitions. The network device automatically identifies contexts that include at least one device for each of the at least two device platforms based on the extracted data. The network device transmits instructions to the at least one device for each of the at least two device platforms based on one of a rule or a request associated with the identified one or more contexts.

US Patent:

20170359237, Dec 14, 2017

Filed:

Jun 13, 2016

Appl. No.:

15/180361

Inventors:

- Arlington VA, US
Zhong Chen - Acton MA, US
Lin Zhu - Lexington MA, US
Ming Chen - Bedford MA, US

International Classification:

H04L 12/26
H04L 29/08

Abstract:

A network device logs transmission control protocol (TCP) flow data for connections between registered devices that are registered for use of secure Internet of Things (IoT) application programming interfaces (APIs). The logging generates logged flow data. The network device receives, from a first registered device, a call validation request for an IoT API call directed to the first registered device from a second registered device. The call validation request includes packet information of the IoT API call. The network device compares the packet information with the logged TCP flow data. When the comparing indicates a match of the packet information and the logged TCP flow data, the network device sends a response to the first registered device to accept the IoT API call. Otherwise, the network device sends a response to the first registered device to reject the IoT API call.

US Patent:

20170359417, Dec 14, 2017

Filed:

Jun 13, 2016

Appl. No.:

15/180629

Inventors:

- Arlington VA, US
Jianxiu Hao - Acton MA, US
Zhong Chen - Acton MA, US
Matthew J. Threefoot - Columbia MD, US

International Classification:

H04L 29/08
H04W 60/04
H04W 4/00

Abstract:

A network device receives a definition for a data product of consumer Internet-of-Things (IoT) data and registers multiple machine-type communications (MTC)-devices for collection of consumer IoT data. The MTC devices provide the consumer IoT data with heterogeneous formats. The registering identifies a profile for each MTC device and particular data types authorized for collection. The network device receives consumer IoT data generated by the multiple MTC devices and extracts the particular data types from the IoT data. The network device normalizes the extracted data to include a uniform data format, and aggregates the normalized IOT data into clusters that exclude device identifiers. The network device constructs the clusters into a data portfolio that meets the definition for the data product.

US Patent:

20170171187, Jun 15, 2017

Filed:

Dec 15, 2015

Appl. No.:

14/969187

Inventors:

- Arlington VA, US
Jianxiu HAO - Acton MA, US
Zhong CHEN - Acton MA, US

International Classification:

H04L 29/06
H04L 9/32

Abstract:

A first device may receive a request from a second device. The request may include a device identifier associated with the second device. The request may be transmitted by the second device to obtain a signature, based on which to access a third device. The first device may determine that the device identifier is associated with a secure authentication service. The first device may generate a signature based on determining that the device identifier is associated with the secure authentication service. The first device may provide the signature to the third device. The signature may permit the third device to selectively permit or deny access by the second device based on a result of authenticating the signature. Access may be permitted when the third device successfully authenticates the signature, and access may be denied when the third device fails to authenticate the signature.

US Patent:

20170149937, May 25, 2017

Filed:

Nov 24, 2015

Appl. No.:

14/950800

Inventors:

- Arlington VA, US
Dongchen Wang - Concord MA, US
Ming Chen - Bedford MA, US
Zhong Chen - Acton MA, US

International Classification:

H04L 29/06

Abstract:

A method, a device, and a non-transitory storage medium provides to receive a packet from an Internet of Things (IoT) device, wherein the packet carries IoT data; determine a classification of the IoT device from which the first packet is received, in response to a receipt of the packet, wherein the classification indicates a type of IoT device; select standard data types assigned to the classification of the IoT device, in response to a determination of the classification of the IoT device; determine whether the IoT data includes all of the standard data types based on the standard data types selected; convert the IoT data into an IoT standard format in response to a determination that the IoT data includes all of the standard data types; generate another packet that includes the IoT data in the IoT standard format in response to a conversion of the IoT data; and transmit the other packet to a network device.