Jian Chen, 4526 Madison St #11J, New York, NY 10038

6904223, Jun 7, 2005

Apr 4, 2003

10/408073

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

Optiworks, Inc. - Fremont CA

G02B006/00

385140, 385134

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.

7073830, Jul 11, 2006

Oct 25, 2005

11/258303

Jian Chen - Flushing NY, US
Dennis Q. Chen - Flushing NY, US

B60R 19/44

293142, 293109, 293126

A bumper protection device for automobile bumpers to shield the bumpers from impact attaches to the automobile by a fabric shroud which attaches around the hood and trunk latch and suspends an impact resisting padded guard portion, adapted to the vehicle bumper, covering the entire front or rear bumper, the padded guard portion being drawn partially around the sides of the bumper and anchored by at least one elastic strap attached to opposing ends of the bumper guard portion, each elastic strap being further attached to the tires or wheel wells of the automobile retaining the bumper protection device over the entire rear bumper surface and around the sides of the bumper.

5773428, Jun 30, 1998

Feb 5, 1996

8/597062

Arlindo Lucas Castelhano - New City NY
Teng Jiam Liak - Mississauga, CA
Stephen Horne - Burlington, CA
Alexander Krantz - Menlo Park CA
Zhengyu Yuan - Fremont CA
Jian Jeffrey Chen - Santa Clara CA
Paul David Cannon - San Carlos CA
Hal Van Wart - Los Altos CA

Syntex (U.S.A.) Inc. - Palo Alto CA

A61K 31395
C07D48704

514 80

Compounds of formula (I): ##STR1## as single stereoisomers or mixtures thereof and their pharmaceutically acceptable salts inhibit matrix metalloproteases, such as interstitial collagenases, and are useful in the treatment of mammals having disease states alleviated by the inhibition of such matrix metalloproteases, for example arthritic diseases or bone resorption diseases, such as osteoporosis.

2021005, Feb 25, 2021

Aug 22, 2019

16/548675

- Orange CA, US
Jian Feng Chen - Fords NJ, US

H03H 9/215
H03H 9/02
H01L 41/04

The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal. Each of the tines has formed on one or both of opposing sides thereof a vertically protruding line structure laterally elongated in the horizontal lengthwise direction. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.

2021005, Feb 25, 2021

Aug 21, 2020

16/999579

- Orange CA, US
Jian Feng Chen - Fords NJ, US

H03H 9/215
H03H 9/05
H03H 9/13
H03H 9/10
G01K 7/32
H03H 9/02

The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal, wherein each of the tines has formed on one or both of opposing sides thereof a pair of vertically recessed groove structures laterally elongated in the horizontal lengthwise direction, wherein the pair of groove structures are separated in a horizontal widthwise direction by a line structure. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.