Li Chin Chen

6379381, Apr 30, 2002

Sep 3, 1999

09/390069

Syed F. A. Hossainy - Fremont CA
Li Chen - San Jose CA

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

A61F 206

623 142, 623 143, 623 115, 623 237

An implantable prosthesis, for example a stent, is provided that is capable of being loaded with substances. In one example, the prosthesis is a cylindrical-shaped body having depots or pores formed thereon. The depots can be formed at preselected locations on the body of the prosthesis and can have a preselected depth, size, and shape. The depots can have various shapes including a cylindrical or a conical shape. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots.

6395326, May 28, 2002

May 31, 2000

09/583371

Daniel Castro - Santa Clara CA
Steven Wu - Santa Clara CA
Kevin L. Woolbright - Sunnyvale CA
Kurt W. Scheinpflug - Sunnyvale CA
Syed F. A. Hossainy - Fremont CA
Li Chen - San Jose CA

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

A61L 2700

427 224, 427 225, 427 228, 427 23, 427261, 427286, 427287

A patterned coating on a prosthesis, for example a stent, and a method for forming the coating are disclosed. Additionally, an apparatus for forming the patterned coating is disclosed.

6558733, May 6, 2003

Oct 26, 2000

09/697104

Syed F. A. Hossainy - Fremont CA
Li Chen - San Jose CA

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

B05D 132

427 224, 427 21, 427 228, 427534, 427555, 427556, 427554, 427154, 427155, 427156, 427282, 427287, 427271, 427272, 427273, 427300, 427307, 216 8, 216 9, 216 10, 216 41, 216 44, 216 45, 216 56, 216 94, 216106, 216108, 216109

An implantable prosthesis, for example a stent, is provided having one or more micropatterned microdepots formed in the stent. Depots are formed in the prosthesis via chemical etching and laser fabrication methods, including combinations thereof. They are formed at preselected locations on the body of the prosthesis and have a preselected depth, size, and shape. The depots can have various shapes including a cylindrical, a conical or an inverted-conical shape. Substances such as therapeutic substances, polymeric materials, polymeric materials containing therapeutic substances, radioactive isotopes, and radiopaque materials can be deposited into the depots.

6560321, May 6, 2003

Sep 27, 1999

09/405581

Li Chen - Stanford CA
Keith Chu - Laguna Niguel CA

Conexant Systems, Inc. - Newport Beach CA

H04M 1100

37910017, 37910001, 370292, 375222

A half-duplex facsimile modem system according to the present invention may exhibit a shorter startup time relative to conventional systems. The modem system exchanges capabilities information concurrently with the transmission of a conventional answer signal, thus obviating the need for performing a separate capabilities exchange procedure. In addition, the modem system is capable of determining a preferred training sequence duration based upon one or more characteristics of the current channel. The preferred training sequence duration is communicated from the answer modem to the calling modem such that the calling modem can format the training sequence in an appropriate manner. The resultant training sequence has a time duration that is variable in response to, e. g. , the signal-to-noise ratio of the instant channel. These techniques can result in a significant reduction in the startup latency typically associated with conventional half-duplex facsimile modem systems.

6563977, May 13, 2003

Jun 27, 2000

09/605523

Li Chen - Fremont CA
Shu Zhang - Fremont CA
Wei Yang - Fremont CA

Bayspec, Inc. - Fremont CA

G02B 628

385 24, 385 31, 385 33, 359115, 359122

An optical multiplexing and demultiplexing device includes: a fiber mounting means for securing a plurality of optical fibers each terminating in a fiber end, at least one of the fiber ends radiating a corresponding input beam having a polarization state defined by a polarization plane that may vary as a function of time, and at least one of the fiber ends for receiving an output beam; collimating and focusing means having a focal length, and providing collimation of the input beams, and focusing of the output beams; diffraction means including at least one diffractive element providing for dispersion of optical beams passing therethrough, each diffractive element having an associated diffraction efficiency that varies as a function of the polarization state of light beams passing therethrough; and a polarization rotating means for rotating the plane of polarization of a beam passing therethrough by a specified number of degrees. The device provides for a particular input beam having a first polarization state to be diffracted by the diffractive elements in accordance with a first diffraction efficiency based on the first polarization state. The beam is then passed through the polarization rotating means at least once and thereby rotated into a second polarization state.

6585765, Jul 1, 2003

Jun 29, 2000

09/608444

Syed F. A. Hossainy - Fremont CA
Jacqueline Ghio - San Carlos CA
Li Chen - San Jose CA

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

A61F 206

623 145, 623 66, 427 224

The present invention provides a method of impregnating an implantable device, such as a vascular graft or a covering adapted to be disposed over a prosthesis. The substances may be impregnated within the implantable device as a passive coating or as a delivery matrix for a therapeutic substance. Also provided is an implantable device having such substances impregnated therein.

6616765, Sep 9, 2003

Jan 10, 2002

10/043500

Daniel Castro - Santa Clara CA
Steven Wu - Santa Clara CA
Kevin L. Woolbright - Sunnyvale CA
Kurt W. Scheinpflug - Sunnyvale CA
Syed F. A. Hossainy - Fremont CA
Li Chen - San Jose CA

Advanced Cardiovascular Systems, Inc. - Santa Clara CA

B05C 1100

118669, 118677, 118679, 118320

A patterned coating on a prosthesis, for example a stent, and a method for forming the coating are disclosed. Additionally, an apparatus for forming the patterned coating is disclosed.

6624403, Sep 23, 2003

Oct 11, 2001

09/975515

Li Chen - Fremont CA
Martin Ebert - Fremont CA
Dale Linseth - Hollister CA

Therma-Wave, Inc. - Fremont CA

G02B 2740

2502012, 2502014, 25055929, 396 89

An autofocus system for maintaining a sample in the focal plane of a primary lens is disclosed. A light source generates a monitor beam which is focused onto the sample through the primary lens. The reflected beam passes back through the primary lens and is directed to a secondary lens. The beam is then split by a reflective wedge into two portions with different path lengths such that the beam waists of the two portions are spatially separated. An aperture is located between the two beam waists. A bi-cell photodetector measures the intensity of the two beam portions transmitted by the aperture. The measured intensity levels vary with respect to the position of the sample. By comparing the measured intensity levels, an indication of the position of the sample can be obtained.