Walter J Lee

US Patent:

8229370, Jul 24, 2012

Filed:

Mar 10, 2009

Appl. No.:

12/401570

Inventors:

Mario Wu - Alhambra CA, US
Makoto Nakayama - Woodland Hills CA, US
John Guo - Oak Park CA, US
Jack Lieng - Chatsworth CA, US
Walter Lee - Rosemead CA, US

Assignee:

Minebea Co., Ltd. - Nagano-Ken

International Classification:

H04B 17/00
H04B 1/04

US Classification:

455 83, 4551271, 4551151

Abstract:

A method for automatically adjusting signal output power of a ZigBee wireless module. The method includes sending a signal with an output power from a transmitter of a ZigBee module to a receiver. The ZigBee module includes a power amplifier/low noise amplifier (PA/LNA) circuit. The output power can be adjusted between a minimum level and a maximum level. Additionally, the method includes generating a Link Quality Indicator (LQI) by the receiver based on the signal strength and returning the LQI to the ZigBee module. If the LQI is not within a predetermined range between a maximum value and a minimum value, the method includes adjusting the output power for sending next signal. If the output power from the transmitter has reached to the minimum level or the maximum level, the method further includes adjusting the PA/LNA circuit of the ZigBee module for maintaining the LQI within the predetermined range.

US Patent:

8439970, May 14, 2013

Filed:

Jul 13, 2010

Appl. No.:

12/835555

Inventors:

Teodoro S. Jimenez - Irvine CA, US
Walter Lee - Irvine CA, US
Mark Dehdashtian - Irvine CA, US
Kristopher Yee - Huntington Beach CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 211, 623 111

Abstract:

A delivery system for delivering a prosthetic heart valve to the aortic valve annulus. The system includes a delivery catheter having a steering mechanism thereon for delivering a balloon-expandable prosthetic heart valve to the aortic annulus in an antegrade fashion through an introducer passing into the left ventricle through its apex. The introducer may have a more floppy distal section than a proximal section to reduce trauma to the heart wall. The delivery catheter includes a deflecting segment just proximal to a distal balloon to facilitate positioning of the prosthetic heart valve in the proper orientation within the annulus. A trigger in a catheter handle may be coupled to a deflection wire that actuates the deflecting segment, while a slider in the handle controls retraction of a valve pusher. A pre-dilation valvuloplasty procedure may also be utilized.

US Patent:

8475522, Jul 2, 2013

Filed:

Jul 13, 2010

Appl. No.:

12/835546

Inventors:

Teodoro S. Jimenez - Irvine CA, US
Walter Lee - Irvine CA, US
Mark Dehdashtian - Irvine CA, US
Kristopher Yee - Huntington Beach CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 211, 623 111

Abstract:

A delivery system for delivering a prosthetic heart valve to the aortic valve annulus. The system includes a delivery catheter having a steering mechanism thereon for delivering a balloon-expandable prosthetic heart valve to the aortic annulus in an antegrade fashion through an introducer passing into the left ventricle through its apex. The introducer may have a more floppy distal section than a proximal section to reduce trauma to the heart wall. The delivery catheter includes a deflecting segment just proximal to a distal balloon to facilitate positioning of the prosthetic heart valve in the proper orientation within the annulus. A trigger in a catheter handle may be coupled to a deflection wire that actuates the deflecting segment, while a slider in the handle controls retraction of a valve pusher. A pre-dilation valvuloplasty procedure may also be utilized.

US Patent:

20130030520, Jan 31, 2013

Filed:

Jul 26, 2012

Appl. No.:

13/559395

Inventors:

Walter Lee - Irvine CA, US
Mark Dehdashtian - Irvine CA, US
Teodoro S. Jimenez - Irvine CA, US
Gilbert S. Leung - La Verne CA, US
Bryan Janish - Irvine CA, US
Michael G. Valdez - Riverside CA, US
Tram Nguyen - Santa Ana CA, US
Timothy C. Ulrich - Rancho Santa Margarita CA, US

International Classification:

A61F 2/24

US Classification:

623 211

Abstract:

Described herein are systems and methods from delivering prosthetic devices, such as prosthetic heart valves, through the body and into the heart for implantation therein. The prosthetic devices delivered with the delivery systems disclosed herein are, for example, radially expandable from a radially compressed state mounted on the delivery system to a radially expanded state for implantation using an inflatable balloon of the delivery system. Exemplary delivery routes through the body and into the heart include transfemoral routes, transapical routes, and transaortic routes, among others.

US Patent:

20130345798, Dec 26, 2013

Filed:

Jun 19, 2013

Appl. No.:

13/922129

Inventors:

Walter Lee - Irvine CA, US
Mark Dehdashtian - Irvine CA, US
Kristopher J. Yee - Huntington Beach CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 211

Abstract:

A delivery system and method for delivering a prosthetic heart valve to the aortic valve annulus. The system includes a delivery catheter having a steering mechanism thereon for delivering a balloon-expandable prosthetic heart valve to the aortic annulus in an antegrade fashion through an introducer passing into the left ventricle through its apex. The introducer may have a more floppy distal section than a proximal section to reduce trauma to the heart wall while preserving good operating field stability. The delivery catheter includes a deflecting segment just proximal to a distal balloon to facilitate positioning of the prosthetic heart valve in the proper orientation within the aortic annulus. A trigger in a catheter handle may be coupled to a deflection wire that actuates the deflecting segment, while a slider in the handle controls retraction of a valve pusher. The prosthetic heart valve may be installed over the existing calcified leaflets, and a pre-dilation valvuloplasty procedure may also be utilized.

US Patent:

40746941, Feb 21, 1978

Filed:

Apr 9, 1976

Appl. No.:

5/675284

Inventors:

Walter S. Lee - Corona CA

Assignee:

Leemco, Inc. - Corona CA

International Classification:

F16K 3112

US Classification:

13750541

Abstract:

A pressure regulator with a spring loaded diaphragm having spring pressure and atmospheric pressure on one side and line pressure on the other for moving a valve stem in a valve seat for controlling downstream pressure. A soft seat design utilizing a metal seat in the regulator body and a resilient valve insert carried on the valve stem for engaging the seat. An annular flexible insert carried in an annular groove in the valve stem.

US Patent:

20230025110, Jan 26, 2023

Filed:

Sep 30, 2022

Appl. No.:

17/958105

Inventors:

- Irvine CA, US
Walter Lee - Irvine CA, US
Mark M. Dehdashtian - Irvine CA, US
Kristopher J. Yee - San Jose CA, US

International Classification:

A61F 2/24
A61M 25/01

Abstract:

A delivery system and method for delivering a prosthetic heart valve to the aortic valve. The system includes a delivery catheter having a steering mechanism thereon for delivering a balloon-expandable prosthetic heart valve to the aortic valve through an introducer passing into the left ventricle through its apex. The introducer may have a more floppy distal section than a proximal section to reduce trauma to the heart wall while preserving good operating field stability. The delivery catheter includes a deflecting segment just proximal to a distal balloon to facilitate positioning of the prosthetic heart valve in the proper orientation. A trigger in a catheter handle may be coupled to a deflection wire that actuates the deflecting segment, while a slider in the handle controls retraction of a valve pusher. The prosthetic heart valve may be installed over the existing calcified leaflets, and a pre-dilation valvuloplasty procedure may also be utilized.

US Patent:

20200100896, Apr 2, 2020

Filed:

Dec 4, 2019

Appl. No.:

16/703695

Inventors:

- Irvine CA, US
Walter Lee - Irvine CA, US
Mark M. Dehdashtian - Irvine CA, US
Kristopher J. Yee - San Jose CA, US

International Classification:

A61F 2/24
A61M 25/01

Abstract:

A delivery system and method for delivering a prosthetic heart valve to the aortic valve. The system includes a delivery catheter having a steering mechanism thereon for delivering a balloon-expandable prosthetic heart valve to the aortic valve through an introducer passing into the left ventricle through its apex. The introducer may have a more floppy distal section than a proximal section to reduce trauma to the heart wall while preserving good operating field stability. The delivery catheter includes a deflecting segment just proximal to a distal balloon to facilitate positioning of the prosthetic heart valve in the proper orientation. A trigger in a catheter handle may be coupled to a deflection wire that actuates the deflecting segment, while a slider in the handle controls retraction of a valve pusher. The prosthetic heart valve may be installed over the existing calcified leaflets, and a pre-dilation valvuloplasty procedure may also be utilized.