Thomas L Chen

US Patent:

8601587, Dec 3, 2013

Filed:

Sep 3, 2010

Appl. No.:

12/875854

Inventors:

William S. Powell - Gibsonton FL, US
Thomas L. Chen - Seminole FL, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

G06F 11/00
G06F 12/14
G06F 12/16
G08B 23/00

US Classification:

726 25

Abstract:

According to certain embodiments, a cyber threat analysis system generates a network model of a network infrastructure that is used by an organization, assigns a weighting value to each of a plurality of network elements of the network infrastructure according to a relative importance of the each network element to the organization, and generates an attack vector according to a determined vulnerability of the network infrastructure. The attack vector represents one or more illicit actions that may be performed to compromise the network infrastructure. The system may simulate, using a network modeling tool, the attack vector on the network model to determine one or more resulting ramifications of one or more of the plurality of network elements due to the attack vector, and determine a criticality level of the attack vector according to the weighting value of the one or more network elements.

US Patent:

44778414, Oct 16, 1984

Filed:

Oct 6, 1981

Appl. No.:

6/309192

Inventors:

Thomas Y. Chen - East Brunswick NJ
Walter G. Gibson - Princeton NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04N 576

US Classification:

358335

Abstract:

A filter limits the bandwidth of a caption video signal in a video disc player to minimize color beats when the caption signal is displayed along with a picture video signal on a television receiver. The filter delay, which would otherwise cause offset between the caption and an associated background signal used to enhance visibility of the caption, is compensated for by extending the time duration of each occurrence of the background signal by a multiple of the filter delay.

US Patent:

50900498, Feb 18, 1992

Filed:

May 22, 1990

Appl. No.:

7/526641

Inventors:

Thomas N. Chen - Bethesda MD

International Classification:

H04M 1100

US Classification:

379100

Abstract:

A fax message record/relay device or system operates in conjunction with a local fax machine. The system allows the local fax machine to operate normally while the record/relay device simply records incoming fax messages and stores them in a memory. An authorized person may call in to the record/relay system and request that the fax messages be forwarded to a telephone number corresponding to a fax machine which the authorized person has immediate access to. The authorized person uses a password and a DTMF push button telephone in order to remotely input commands to the record/relay system.

US Patent:

39378985, Feb 10, 1976

Filed:

Jul 18, 1974

Appl. No.:

5/489574

Inventors:

Anthony Frank Presto - Nutley NJ
James Grant Dunn - Upper Montclair NJ
Thomas Chungmin Chen - West Caldwell NJ

Assignee:

International Telephone and Telegraph Corporation - Nutley NJ

International Classification:

H04M 356
H04Q 1104

US Classification:

179 18BC

Abstract:

There is disclosed a digital conference bridge for a delta modulated switching system having information transmitted by delta modulation bits in M channels of a time division multiplex frame, where M is an integer greater than three. N conferees, where N is an integer greater than two but less than M, are interconnected by a time switch to enable a conference to take place among the conferees. N three stage shift registers are provided, one for the delta modulation bits of each of the conferees. N sequence detectors are coupled to an associated one of the shift registers to produce a binary 1 output when bits stored in the shift register are all binary 1 or all binary 0. N counters each have their count increased by the binary 1 output of an associated one of the sequence detectors. A count comparator is coupled in common to all the counters and produces a control signal indicating a new speaker for the counter having the largest count. A selection matrix is coupled to each shift register and responds to the control signal to couple the delta modulation data of the new speaker through a one stage memory to the time switch for distribution to all of the conferees.

US Patent:

20140245449, Aug 28, 2014

Filed:

Dec 2, 2013

Appl. No.:

14/094492

Inventors:

William Shane Powell - Gibsonton FL, US
Thomas L. Chen - Seminole FL, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H04L 29/06

US Classification:

726 25

Abstract:

According to certain embodiments, a cyber threat analysis system generates a network model of a network infrastructure that is used by an organization, assigns a weighting value to each of a plurality of network elements of the network infrastructure according to a relative importance of the each network element to the organization, and generates an attack vector according to a determined vulnerability of the network infrastructure. The attack vector represents one or more illicit actions that may be performed to compromise the network infrastructure. The system may simulate, using a network modeling tool, the attack vector on the network model to determine one or more resulting ramifications of one or more of the plurality of network elements due to the attack vector, and determine a criticality level of the attack vector according to the weighting value of the one or more network elements.