Jian Chen

US Patent:

6904223, Jun 7, 2005

Filed:

Apr 4, 2003

Appl. No.:

10/408073

Inventors:

Zuyun Fang - Henderson NV, US
Jianhua Wang - Saratoga CA, US
Jian J. Chen - Fremont CA, US

Assignee:

Optiworks, Inc. - Fremont CA

International Classification:

G02B006/00

US Classification:

385140, 385134

Abstract:

In a preferred embodiment, a motorized variable optical attenuator comprises an input fiber collimator; an output fiber collimator disposed substantially along the first collimator; and a right-angle reflector movable relative to the input collimator and the output collimator along a translation direction forming a non-zero angle with a direction of a light beam emitted by the input collimator. The reflector comprises two mutually-perpendicular reflective surfaces for sequentially reflecting the light beam emitted by the input collimator to the output collimator. A variable attenuation imparted by the attenuator on the light beam is determined by a position of the reflector relative to the input collimator and the output collimator, along the translation direction. The reflector preferably comprises a right-angle prism adhered to a nut mounted on a threaded axle driven by a stepper motor. The attenuator can achieve stable, ripple-free attenuation characteristics at insertion losses beyond −40 dB.

US Patent:

8030161, Oct 4, 2011

Filed:

May 15, 2008

Appl. No.:

12/121591

Inventors:

Xiangfeng Duan - Los Angeles CA, US
Jian Chen - Mountain View CA, US
J. Wallace Parce - Palo Alto CA, US
Francisco A. Leon - Palo Alto CA, US

Assignee:

Nanosys, Inc. - Palo Alto CA

International Classification:

H01L 21/336
H01L 29/788

US Classification:

438260, 257317

Abstract:

A nonvolatile memory cell includes a substrate comprising a source, drain, and channel between the source and the drain. A tunnel dielectric layer overlies the channel, and a localized charge storage layer is disposed between the tunnel dielectric layer and a control dielectric layer. A gate electrode has a first surface adjacent to the control dielectric layer, and the first surface includes a midsection and two edge portions. According to one embodiment, the midsection defines a plane, and at least one edge portion extends away from the plane. Preferably, the edge portion extending away from the plane converges toward an opposing second surface of the gate electrode. According to another embodiment, the gate electrode of the nonvolatile memory cell includes a first sublayer and a second sublayer of a different width on the first sublayer.

US Patent:

8067468, Nov 29, 2011

Filed:

Sep 12, 2009

Appl. No.:

12/584769

Inventors:

Jian Chen - Diamond Bar CA, US

International Classification:

A61K 31/225
A61K 31/205
C07C 69/66
C07C 229/24

US Classification:

514547, 514556, 560176, 562575

Abstract:

Salts of L-carnitine and alkanoyl L-carnitines with phytic acid of general formula (I), and the process of preparing the same, wherein the mole ratio between the L-carnitine or its alkanoyl derivatives cation and phytic acid anion be within the range of 1:1 to 6:1, wherein: n=1-6; Ris the phytate anion; R is either hydrogen, a straight alkanoyl group having 2-12 carbon atoms or a branched-chain alkanoyl group having 2-12 carbon atoms.

US Patent:

20030009909, Jan 16, 2003

Filed:

Jul 10, 2001

Appl. No.:

09/903084

Inventors:

Jian Chen - San Marino CA, US

International Classification:

A43B003/12

US Classification:

036/011500, 036/141000

Abstract:

A health-diet sandal which comprises a shoe sole having a heel portion adapted for biasing against an arch portion of a wearer's foot, and a shoe body comprising a vamp attached on top of the shoe sole to define a foot chamber between the vamp and the shoe sole, and an elongated elastic unit having two ends extended from two sides of the vamp adapted for mounting behind a heel of the wearer's foot, so as to hold the wearer's foot within the foot chamber in position. Therefore, the nervous distributed around the arch portion of the wearer's foot is able to be stimulated by the heel portion of the shoe sole for improving the wearer's blood circulation and metabolism.

US Patent:

20050250944, Nov 10, 2005

Filed:

May 4, 2004

Appl. No.:

10/838900

Inventors:

Jian Chen - Diamond Bar CA, US

International Classification:

C07D265/30
C07D239/70

US Classification:

544170000, 544400000, 548571000, 564338000

Abstract:

The present invention discloses a novel syntheses of synephrine, its derivatives, and the salts of the foregoing, including their intermediates. One or more of the substituents of the nitrogen atom of the synephrine is/are modified to produce the derivatives. The synephrine derivatives and their salts are useful for treating animals for diseases, conditions, or disorders modulated by β-adrenergic receptor. They are preferably used as fat breakdown agents and/or weight loss agents.

US Patent:

20090193266, Jul 30, 2009

Filed:

Jan 28, 2008

Appl. No.:

12/011608

Inventors:

Melvin G. Gable - Cowan Heights CA, US
Jian Chen - Irvine CA, US

International Classification:

G06F 12/14
G06F 21/24

US Classification:

713193, 726 27

Abstract:

A method and apparatus for storing both protected and clear data on a single storage device . The apparatus includes storage media for storing digital material such as video, sound, pictures and text. The media is partitioned into protected and unprotected areas . The apparatus further includes circuitry for accessing, decrypting and encrypting data. This circuitry includes a controller with associated ROM for directing the controller and communication ports for connecting to a source of content and a sink for storage. The method includes partitioning a storage device into clear and protected areas and directing protected data to the protected area and clear data to the clear area . One embodiment includes an encrypted directory in the protected area and a conventional directory in the clear area

US Patent:

20120163299, Jun 28, 2012

Filed:

Aug 17, 2010

Appl. No.:

13/392887

Inventors:

Jian Wen Chen - Los Angeles CA, US
Lin Chen - Beijing, CN
Yonghua Lin - Beijing, CN
Qing Wang - Beijing, CN
Rong Yan - Beijing, CN
Zhen Bo Zhu - Beijing, CN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04W 56/00
H04W 24/02
H04W 88/08

US Classification:

370328

Abstract:

A wireless communication system base station, and a remote radio head (RRH) and a computer-implemented synchronization method for the wireless communication system base station. The RRH is communicably coupled to a baseband unit (BBU) of the wireless communication system base station through a network, and the BBU processes and transmits downlink data to the RRH. The RRH includes: a time-delay measurement unit for measuring a time-delay for the downlink data to arrive at the RRH from the BBU; and a time-delay notification unit for notifying from the RRH to the BBU of time-delay data on the time-delay measured by the time-delay measurement unit, wherein the time-delay data is used to advance the starting time for the BBU to process and transmit the downlink data by an amount of time obtained based on the time-delay data.

US Patent:

20120300766, Nov 29, 2012

Filed:

Aug 10, 2012

Appl. No.:

13/571534

Inventors:

Jian Wen Chen - Los Angeles CA, US
Lin Chen - Beijing, CN
Yonghua Lin - Beijing, CN
Qing Wang - Beijing, CN
Rong Yan - Beijing, CN
Zhen Bo Zhu - Beijing, CN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04W 56/00

US Classification:

370350

Abstract:

A wireless communication system base station, and a remote radio head (RRH) and a computer-implemented synchronization method for the wireless communication system base station. The RRH is communicably coupled to a baseband unit (BBU) of the wireless communication system base station through a network, and the BBU processes and transmits downlink data to the RRH. The RRH includes: a time-delay measurement unit for measuring a time-delay for the downlink data to arrive at the RRH from the BBU; and a time-delay notification unit for notifying from the RRH to the BBU of time-delay data on the time-delay measured by the time-delay measurement unit, wherein the time-delay data is used to advance the starting time for the BBU to process and transmit the downlink data by an amount of time obtained based on the time-delay data.