David J Ryan

US Patent:

6480522, Nov 12, 2002

Filed:

Nov 28, 2000

Appl. No.:

09/723338

Inventors:

Elliott Hoole - Redmond WA
Mary Jesse - Issaquah WA
David James Ryan - Seattle WA
David Stephenson - San Jose CA

Assignee:

ATT Wireless Services, Inc. - Redmond WA

International Classification:

A61F 206

US Classification:

375130, 375135, 370242

Abstract:

A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides a considerable savings in computational complexity for moderate output FFT sizes. Point-to-multipoint and multipoint-to-multipoint (nodeless) network topologies are possible. A code-nulling method is included for interference cancellation and enhanced signal separation by exploiting the spectral diversity of the various sources. The basic method may be extended to include multielement antenna array nulling methods for interference cancellation and enhanced signal separation using spatial separation. Such methods permit directive and retrodirective transmission systems that adapt or can be adapted to the radio environment. Such systems are compatible with bandwidth-on-demand and higher-order modulation formats and use advanced adaptation algorithms.

US Patent:

D467745, Dec 31, 2002

Filed:

Feb 28, 2002

Appl. No.:

29/156488

Inventors:

David Ryan - Seattle WA

Assignee:

Steelcase Development Corporation - Caledonia MI

International Classification:

0601

US Classification:

D 6364

US Patent:

D473389, Apr 22, 2003

Filed:

Sep 9, 2002

Appl. No.:

29/167081

Inventors:

David Ryan - Seattle WA

Assignee:

Steelcase Development Corporation - Caledonia MI

International Classification:

0601

US Classification:

D 6364

US Patent:

6639935, Oct 28, 2003

Filed:

Jul 12, 2001

Appl. No.:

09/902730

Inventors:

David Gibbons - Redmond WA
Robert Lee Maxwell - Duvall WA
David James Ryan - Seattle WA

Assignee:

ATT Wireless Services, Inc. - Redmond WA

International Classification:

H04B 169

US Classification:

375130, 375342

Abstract:

A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system. Each remote station and each base station in the network prepares an error detection field, such as a cyclic redundancy code (CRC), on each block of data to be transmitted over the traffic channels. The sending station prepares an error detection message for transmission over the link control channel of the network. The sending station prepares the error detection message by forming a link control channel vector that will be spread using the discrete multitone spread spectrum (DMT-SS) protocol to distribute the data message over a plurality of discrete tone frequencies, forming a spread signal for the link control channel. A link control channel is associated with communications session using the traffic channels. The instant of transmission of the error detection message is allowed to be different from the instant of transmission of the data message.

US Patent:

6643281, Nov 4, 2003

Filed:

Mar 5, 1998

Appl. No.:

09/035210

Inventors:

David James Ryan - Seattle WA

Assignee:

ATT Wireless Services, Inc. - Redmond WA

International Classification:

H04J 306

US Classification:

370350, 370208, 370328

Abstract:

A highly bandwidth-efficient communications method is disclosed that enables remote stations to synchronize in time and frequency to their serving base station. The invention enables a base station and its remote stations in a cell to synchronize in a noisy environment where signals interfere from other base stations and remote stations in other cells. The base station forms a forward synchronization burst that includes a plurality of tone frequencies arranged in a distinctive orthogonal frequency division multiplexed pattern unique to the base station. The unique pattern enables a remote station to distinguish the base stations bursts from other signals present in a crowded area. The distinctive orthogonal frequency division multiplexed pattern can be a Hadamard code pattern, for example. When the a base station has received a signal on a reverse link from a remote station, having significant interference, the base station selectively forms a request signal requesting the remote station to respond with a reverse synchronization burst that includes a plurality of tone frequencies arranged in the same distinctive orthogonal frequency division multiplexed pattern. The base station then transmits the forward synchronization burst and the request signal at a base station reference instant of time to the remote station.

US Patent:

6692781, Feb 17, 2004

Filed:

Jul 13, 2001

Appl. No.:

09/904998

Inventors:

David Ryan - Seattle WA 98112
Matt S. Vaughan - Seattle WA 98103

International Classification:

B65B 2902

US Classification:

426 79, 426 82, 426110, 426115, 206 05, 206219, 2104931, 2104933, 2104935, 383120

Abstract:

A beverage infusion device comprises a handle and a support member extending from the handle having a pair of flat legs spaced apart by a predetermined width. Attached to each side of the flat legs is a flexible porous member, for example, a pouch of filter material having an unfolded width greater than the width of the support legs. Each porous member contains an infusible beverage preparation and is supported by the support legs in a folded position wherein, upon immersion of the porous members in a liquid, the porous members expand and become spaced to facilitate infusion of a beverage preparation therein into the liquid. In the folded position, the porous members may have a plurality of folds across its width, for example, folds adjacent the first and second ends and an unfolded portion therebetween. The first and second ends of the porous member are preferably heat bonded to the support legs. The device handle is of a configuration to fit between the pair of legs such that the handle and the legs may be stamped from a single piece of flat stock of paper- or plastic-based materials.

US Patent:

D503047, Mar 22, 2005

Filed:

Jun 12, 2003

Appl. No.:

29/183464

Inventors:

David Ryan - Seattle WA, US

Assignee:

Steelcase Development Corporation - Caledonia MI

International Classification:

0601

US Classification:

D 6365

US Patent:

7095708, Aug 22, 2006

Filed:

Jun 14, 2000

Appl. No.:

09/594467

Inventors:

Siavash Alamouti - Seattle WA, US
Jeffrey Battin - Duvall WA, US
David B. Gibbons - Redmond WA, US
James Timothy Golden - Carnation WA, US
Michael R. Hirano - Redmond WA, US
Elliott Hoole - Redmond WA, US
Mary Jesse - Issaquah WA, US
Robert Lee Maxwell - Duvall WA, US
Steven E. McMeekin - Nederland CO, US
David J. Nix - Austin TX, US
David James Ryan - Oakland CA, US
Gregory J. Veintimilla - Redmond WA, US
Hongliang Zhang - Bellevue WA, US

Assignee:

Cingular Wireless II, LLC - Atlanta GA

International Classification:

H04J 11/00

US Classification:

370208, 370210

Abstract:

A fixed wireless system (FWS) utilizing Orthogonal Frequency Division Multiplexing (OFDM) communication techniques is spectrally efficient and responsive to communications involving both voice and high speed data, such as Internet data. The FWS includes a wireless base unit; a plurality of fixed wireless remote units; a plurality of wireless data traffic channels available between the wireless base unit and the plurality of fixed wireless remote units; and a plurality of wireless voice traffic channels available between the wireless base unit and the plurality of fixed wireless remote units. Each wireless traffic channel is identifiable by a unique combination of frequency and time slots. Each wireless data traffic channel is used for carrying high speed data in addressed data packets to and from the plurality of fixed wireless remote units. On the other hand, each wireless voice traffic channel can be assigned and dedicated to a particular voice communication call involving one of the plurality of fixed wireless remote units for carrying voice data of the call.