Patents by Inventor David H. Walters
David H. Walters has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250056828Abstract: Some implementations herein provide for a memory device and methods of formation. The memory device includes a plurality of storage cells arranged vertically and a plurality of corresponding gate all around transistors. Methods of forming the memory device include using a single trench to remove a liner material and form recesses that define cell contact lightly-doped drain regions of the gate all around transistors. Using the single trench to remove the liner material and form the recesses that define the cell contact lightly-doped drain region widths causes the cell contact lightly-doped drain regions to be formed having substantially similar widths.Type: ApplicationFiled: July 24, 2024Publication date: February 13, 2025Inventors: Si-Woo LEE, Yuichi YOKOYAMA, Scott E. SILLS, Gautham MUTHUSAMY, David HWANG, Yoshitaka NAKAMURA, Pavani Vamsi Krishna NITTALA, Yuanzhi MA, Glen H. WALTERS, Haitao LIU, Kamal M. KARDA
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Publication number: 20250040121Abstract: Methods, systems, and devices for multi-layer capacitors for three-dimensional memory systems are described. Memory cells of a memory system may include capacitors having dielectric material between multiple interfaces (e.g., concentric interfaces) of a bottom electrode and a top electrode. A bottom electrode may include a first portion wrapping around a portion of a semiconductor material that is contiguous with a channel of a transistor, and a top electrode may include a first portion wrapping around the first portion of the bottom electrode. The bottom electrode may also include a second portion wrapping around the first portion of the top electrode, and the top electrode may also include a second portion wrapping around the second portion of the bottom electrode. The dielectric material may include respective portions between each interface of the bottom electrode and top electrode which, in some examples, may be a contiguous implementation of the dielectric material.Type: ApplicationFiled: July 18, 2024Publication date: January 30, 2025Inventors: Yuanzhi Ma, Scott E. Sills, Si-Woo Lee, David K. Hwang, Yoshitaka Nakamura, Yuichi Yokoyama, Pavani Vamsi Krishna Nittala, Glen H. Walters, Gautham Muthusamy, Haitao Liu, Kamal Karda
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Patent number: 7013084Abstract: A hierarchical and distributed control architecture for managing an optical communications network. The architecture includes a line card manager level for managing individual line cards in an optical switch, a node manager level for managing multiple line cards in an optical switch/node, and a network management system level for managing multiple optical switches/nodes in a network. An event manager at the node manager level enables software components that are running at the node manager to register for and receive events, and to post events. The events may be triggered, e.g., by a change in a status of the switch, or an alarm condition. Control architecture functionalities include signaling, routing, protection switching and network management. Furthermore, the network management function includes a topology manager, a performance manager, a connection manager, a fault detection manager, and a configuration manager.Type: GrantFiled: February 28, 2001Date of Patent: March 14, 2006Assignee: Lambda OpticalSystems CorporationInventors: Abdella Battou, Moon W. Kim, Anastasios Tzathas, David H. Walters, Mario F. Alvarez, David M. Brooks, I. Michael Mandelberg, Chin J. Chen
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Patent number: 6905155Abstract: In a motor vehicle having a cargo area over an in-floor recess for storing a spare wheel and tire, a multiple height load floor system for covering the in-floor recess provides the option of selecting the depth of the recess. The floor system is adapted to allot a lesser volume to the in-floor recess for use with an undersized spare, or a greater volume when a full-size spare is provided. In a motor vehicle with folding seats, the folding seats are selectively raised or lowered to align with the upper surface of the load floor system in its selected position, in order to present a substantially flat surface for carrying cargo. The selective raising or lowering of the seats and the floor system can be achieved through manually actuated or electrically powered mechanisms.Type: GrantFiled: January 28, 2004Date of Patent: June 14, 2005Assignee: DaimlerChrysler CorporationInventors: William T Presley, Paulius Butkunas, David H Walter
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Patent number: 6792815Abstract: A ring load cell configured to measure force, moment, and temperature components in an orthogonal three-axis coordinate system. The ring-load-cell structure consists of two annular flanges having a common central axis through which a shaft may be disposed. The annular flanges are interconnected by a plurality of filleted posts configured to enhance strain distribution and which are disposed parallel to the common central axis, equally spaced about the circumference of the annular flanges. A plurality of strain gauges is disposed either on the posts or on fillets, and a plurality of temperature sensors is disposed either on the posts or on the inner surfaces of the annular flanges. Signals from the strain gauges and temperature sensors are processed to provide thermally compensated strain measurements of the applied forces and moments on the ring-load-cell structure in the orthogonal three-axis coordinate system.Type: GrantFiled: May 8, 2002Date of Patent: September 21, 2004Assignee: The Timken CompanyInventors: Graham F. McDearmon, David R. Leeper, David H. Walter, Doug H. Smith
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Publication number: 20030209085Abstract: A ring load cell configured to measure force, moment, and temperature components in an orthogonal three-axis coordinate system. The ring-load-cell structure consists of two annular flanges having a common central axis through which a shaft may be disposed. The annular flanges are interconnected by a plurality of filleted posts configured to enhance strain distribution and which are disposed parallel to the common central axis, equally spaced about the circumference of the annular flanges. A plurality of strain gauges is disposed either on the posts or on fillets, and a plurality of temperature sensors is disposed either on the posts or on the inner surfaces of the annular flanges. Signals from the strain gauges and temperature sensors are processed to provide thermally compensated strain measurements of the applied forces and moments on the ring-load-cell structure in the orthogonal three-axis coordinate system.Type: ApplicationFiled: May 8, 2002Publication date: November 13, 2003Applicant: The Timken CompanyInventors: Graham F. McDearmon, David R. Leeper, David H. Walter, Doug H. Smith
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Publication number: 20030163555Abstract: A hierarchical and distributed control architecture for managing an optical communications network. The architecture includes a line card manager level for managing individual line cards in an optical switch, a node manager level for managing multiple line cards in an optical switch/node, and a network management system level for managing multiple optical switches/nodes in a network. An event manager at the node manager level enables software components that are running at the node manager to register for and receive events, and to post events. The events may be triggered, e.g., by a change in a status of the switch, or an alarm condition. Control architecture functionalities include signaling, routing, protection switching and network management. Furthermore, the network management function includes a topology manager, a performance manager, a connection manager, a fault detection manager, and a configuration manager.Type: ApplicationFiled: February 28, 2001Publication date: August 28, 2003Inventors: Abdella Battou, Moon W. Kim, Anastasios Tzathas, David H. Walters, Mario F. Alvarez, David M. Brooks, I. Michael Mandelberg, Chin J. Chen
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Publication number: 20020176131Abstract: An optical communications network having at least one optical switch connected to a network access device. The optical switch includes a first line card disposed along a first communications path over which a first optical signal is transmitted. The first line card is connected to the network access device. A second line card is disposed along a second communications path over which a second optical signal is transmitted. An inter-card communication channel is provided for bridging the second path to the first line card. The system enables the rapid switching of traffic from the first optical path to the second optical path.Type: ApplicationFiled: February 28, 2001Publication date: November 28, 2002Inventors: David H. Walters, Abdella Battou, Anastasios Tzathas
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Patent number: 6019410Abstract: A fold out bed extender for a motor vehicle includes a rear panel, a first set of swing panels and a second set of swing panels articulable from a stowed position to an operable position. Each set of swing panels preferably has a leading panel, a trailing panel and a hinge pivotally interconnecting the leading panel and trailing panels. Each leading panel is adapted to be pivotally attached to the bed of the vehicle and each trailing panel is detachably coupled to the rear panel when the first and second sets of swing panels are in the operable position.Type: GrantFiled: June 30, 1999Date of Patent: February 1, 2000Assignee: DaimlerChryslerInventors: Mark C. Trostle, Carl Mather, Nigel Giddons, David H. Walter
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Patent number: 5161808Abstract: A collapsible planar sealing gasket includes a number of longitudinally extending sections disposed in an end-to-end relationship with each longitudinal section being integrally and continuously joined to an adjacent longitudinally extending section by a corner portion that has an arcuate cut in the gasket material extending from one longitudinal section to an adjoining longitudinal section so as to define a rounded portion of gasket material which allows the bending of the gasket material between a collapsed and an operable position.Type: GrantFiled: February 12, 1991Date of Patent: November 10, 1992Assignee: Great Gasket Concepts, Inc.Inventor: David H. Walters