Vinh Thai Le

US Patent:

7031436, Apr 18, 2006

Filed:

Apr 9, 2003

Appl. No.:

10/410697

Inventors:

William Garey - Arlington TX, US
Vinh Le - Arlington TX, US

International Classification:

H04M 11/00

US Classification:

379 37, 379 40, 379 39

Abstract:

A telephone security device is built into a telephone unit. The device includes a sensor to detect an intrusion into the area in which the telephone is located. Upon detection of an event, the device places the telephone off hook, and triggers the redial feature of the telephone. This causes the telephone to redial the last number that had been called. The telephone then remains in the off hook condition for a delay interval to allow the recipient of the call to listen, via the telephone, for any sounds indication that an actual intrusion has occurred. In order to arm the security device, the user simply dials the number that is the intended recipient of the call, hang up, and switch on the sensor. Detection of a security event will then cause the last dialed number to be redialed.

US Patent:

7983684, Jul 19, 2011

Filed:

Jan 31, 2007

Appl. No.:

11/669411

Inventors:

Vinh Le - Fremont CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

H04W 40/00

US Classification:

455446, 4554141, 4554221, 455423, 455457

Abstract:

Systems and methods are provided for optimizing the placement of RF components within an environment. The system operates by defining a spatial model associated with the environment, determining a first placement location of the RF device within the spatial model, defining a localized reference area, determining a coverage area associated with the RF device, identifying a set of gaps associated with the coverage area within the reference area, determining a second placement location of the RF device within the spatial model based on the set of gaps, and placing the AP in the second placement location within the environment.

US Patent:

8223657, Jul 17, 2012

Filed:

Aug 27, 2009

Appl. No.:

12/549043

Inventors:

Ed Geiger - San Martin CA, US
Vinh Le - Fremont CA, US
Nhan Nguyen - San Jose CA, US
Julie Phan - San Jose CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

H04W 24/02

US Classification:

370241, 370252

Abstract:

Techniques are provided for selecting one of a plurality of clock signals used to drive a bus of a WLAN-enabled device having a WLAN radio module coupled to the bus and designed to operate over a plurality of WLAN channels. A network infrastructure device, such as an access point or port, is provided that comprises a WLAN radio module, a PCI bus coupled to the WLAN radio module, a look up table (LUT) and a processor. The WLAN radio module designed to operate over a plurality of WLAN channels in a first frequency band. The LUT comprises a plurality of entries. Each entry comprises: a particular one of the WLAN channels and a corresponding one of a first clock signal having a first clock frequency and a second clock signal having a second clock frequency that is to be selected. The first clock signal causes interference at the WLAN radio module when operating over a first subset of the WLAN channels, and the second clock signal causes interference at the WLAN radio module when operating over a second subset of the WLAN channels. The processor selects, from the LUT based on the one of the WLAN channels that has been selected for the WLAN radio module to communicate over, either the first clock signal or the second clock signal that is to be used to drive the bus.

US Patent:

20060193445, Aug 31, 2006

Filed:

Feb 6, 2006

Appl. No.:

11/349307

Inventors:

William Garey - Arlington TX, US
Vinh Le - Arlington TX, US

International Classification:

H04M 11/04

US Classification:

379037000

Abstract:

A telephone security device is built into a telephone unit. The device includes a sensor to detect an intrusion into the area in which the telephone is located. Upon detection of an event, the device places the telephone off hook, and triggers the redial feature of the telephone. This causes the telephone to redial the last number that had been called. The telephone then remains in the off hook condition for a delay interval to allow the recipient of the call to listen, via the telephone, for any sounds indication that an actual intrusion has occurred. In order to arm the security deice, the user simply dials the number that is the intended recipient of the call, hang up, and switch on the sensor. Detection of a security event will then cause the last dialed number to be redialed

US Patent:

20080180227, Jul 31, 2008

Filed:

Jan 31, 2007

Appl. No.:

11/669887

Inventors:

Vinh Le - Fremont CA, US
Morteza Zarrabian - Los Altos CA, US

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

G08B 1/00

US Classification:

34028602

Abstract:

Systems and methods are provided for optimizing the placement of wireless transmitters or other RF components within an environment. A first one of the plurality of RF devices is initially placed at a first initial location within the spatial model, wherein the first initial location is determined with respect to the reference point. The coverage area for the first RF device is determined, and a second one of the plurality of RF devices is initially placed at a second initial location within the spatial model, wherein the second initial location is determined with respect to the coverage area of the first RF device. At least one of the first and second initial locations can be adjusted to improve the combined coverage area of the first and second RF devices.

US Patent:

20080182528, Jul 31, 2008

Filed:

Jan 31, 2007

Appl. No.:

11/669515

Inventors:

Vinh Le - Fremont CA, US

Assignee:

SYMBOL TECHNOLOGIES, INC. - Holtsville NY

International Classification:

H04B 1/02

US Classification:

455 91

Abstract:

Systems and methods are provided for improving the placement of RF devices each having a position and a coverage area within an environment. The system operates by identifying a gap in the environment that is outside the coverage areas of the RF. A size of the gap and a relative direction of the gap from the position of one of the RF devices are determined. The position of the RF device is then moved in a direction corresponding to the relative direction to thereby reduce the size of the gap. The process can be repeated any number of times until a suitable placement scheme is achieved.

US Patent:

20080182583, Jul 31, 2008

Filed:

Jan 31, 2007

Appl. No.:

11/669374

Inventors:

Vinh Le - Fremont CA, US
Chris Hinsz - San Jose CA, US

Assignee:

SYMBOL TECHNOLOGIES, INC. - Holtsville NY

International Classification:

H04Q 7/36

US Classification:

455446

Abstract:

Systems and methods are provided for optimizing the placement of RF components within an environment. The system operates by defining a spatial model associated with the environment, determining a first placement location of the RF device within the spatial model, determining a coverage area associated with the RF device, identifying a set of gaps associated with the coverage area, calculating a coverage metric based on the set of gaps, determining a second placement location of the RF device within the spatial model based on the coverage metric, and placing the AP in the second placement location within the environment if the coverage metric is less than or equal to a predetermined threshold.

US Patent:

49140450, Apr 3, 1990

Filed:

May 9, 1988

Appl. No.:

7/193193

Inventors:

Monty F. Webb - Irving TX
Vinh Q. Le - Irving TX
Elmer L. Turner - Irving TX

Assignee:

Teccor Electronics, Inc. - Irving TX

International Classification:

H01L 2131

US Classification:

437 6

Abstract:

A two-terminal, bidirectional semiconductor trigger switch is provided. The trigger switch is a relatively sensitive multilayer semiconductor breakover device that switches on fully when its breakover voltage is reached. The design of the trigger switch allows its breakover voltage point to be readily adjustable during fabrication of the device. The semiconductor trigger switch is particularly suited to provide a low voltage trigger for a TRIAC. The trigger switch is connected in series with the gate of the TRIAC and mounted on the gate lead to provide a unitary, three-terminal device incorporating the TRIAC/trigger switch combination.