Brian A Callahan

US Patent:

6496802, Dec 17, 2002

Filed:

Jul 13, 2000

Appl. No.:

09/615591

Inventors:

Alexander T. van Zoest - San Diego CA
Matthew John DiMeo - San Diego CA
Brian Mason Degenhardt - San Diego CA
Charles Lawrence Sismondo - San Diego CA
Brian Callahan - San Diego CA
John William DeRose - San Diego CA
George Matthew Costello - La Jolla CA
Tristan Anne Barnum - San Diego CA
James Park - San Diego CA
Joshua Stephens - San Diego CA
Michael Oliphant - San Diego CA
David M Story - San Diego CA
John P. Knott - San Diego CA
James Martin Moore - San Diego CA

Assignee:

MP3.com, Inc. - San Diego CA

International Classification:

G06F 1760

US Classification:

705 14, 705 51

Abstract:

The present invention is a system and method for providing access to electronic works over a network. In a preferred embodiment, the present invention offers a user access to electronic copies of works, such as songs, albums, movies, or music videos, over a network. The user responds to the offer by requesting to access to a particular work. Before such a request is granted, the present invention may verify that the user is authorized to access to the work. In one embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they possess a physical copy of the work. In another embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they ordered or purchased a copy of the work. If a users authorization is verified, the user may then be provided with access to an electronic copy of the work by such techniques as downloading or streaming.

US Patent:

6609105, Aug 19, 2003

Filed:

Dec 12, 2001

Appl. No.:

10/012467

Inventors:

Alexander T. Van Zoest - San Diego CA
Matthew John Dimeo - San Diego CA
Brian Mason Degenhardt - San Diego CA
Charles Lawerence Sismondo - San Diego CA
Brian Callahan - San Diego CA
John William DeRose - San Diego CA
George Matthew Costello - La Jolla CA
Tristan Anne Barnum - San Diego CA
James Park - San Diego CA
Joshua Stephens - San Diego CA
Michael Oliphant - San Diego CA
David M. Story - San Diego CA
John P. Knott - San Diego CA
James Martin Moore - San Diego CA

Assignee:

MP3.com, Inc. - San Diego CA

International Classification:

G06F 1760

US Classification:

705 14, 705 51

Abstract:

The present invention is a system and method for providing access to electronic works over a network. In a preferred embodiment, the present invention offers a user access to electronic copies of works, such as songs, albums, movies, or music videos, over a network. The user responds to the offer by requesting to access to a particular work. Before such a request is granted, the present invention may verify that the user is authorized to access to the work. In one embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they possess a physical copy of the work. In another embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they ordered or purchased a copy of the work. If a users authorization is verified, the user may then be provided with access to an electronic copy of the work by such techniques as downloading or streaming.

US Patent:

7376581, May 20, 2008

Filed:

Feb 5, 2002

Appl. No.:

10/062554

Inventors:

John William DeRose - San Diego CA, US
Alexander T. Van Zoest - San Diego CA, US
Matthew John Dimeo - San Diego CA, US
Brian Mason Degenhardt - San Diego CA, US
Charles Lawrence Sismondo - San Diego CA, US
Brian Callahan - San Diego CA, US
George Matthew Costello - La Jolla CA, US
Tristan Anne Barnum - San Diego CA, US
James Park - San Diego CA, US
Joshua Stephens - San Diego CA, US
Michael Oliphant - San Diego CA, US
David M Story - San Diego CA, US
John P. Knott - San Diego CA, US
James Martin Moore - San Diego CA, US

Assignee:

Universal Music Group, Inc. - Santa Monica CA

International Classification:

G06Q 30/00

US Classification:

705 14, 705 57, 369 5321

Abstract:

The present invention is a system and method for providing access to electronic works over a network. In a preferred embodiment, the present invention offers a user access to electronic copies of works, such as songs, albums, movies, or music videos, over a network. The user responds to the offer by requesting to access to a particular work. Before such a request is granted, the present invention may verify that the user is authorized to access to the work. In one embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they possess a physical copy of the work. In another embodiment, the user verifies that they are authorized to access an electronic copy of the work by demonstrating that they ordered or purchased a copy of the work. If a user's authorization is verified, the user may then be provided with access to an electronic copy of the work by such techniques as downloading or streaming.

US Patent:

20120186561, Jul 26, 2012

Filed:

Jan 26, 2011

Appl. No.:

12/931199

Inventors:

Steven J. Bethel - Chassell MI, US
Brian J. Callahan - San Diego CA, US
Bryant A. Wagner - San Diego CA, US

Assignee:

Achates Power, Inc. - San Diego CA

International Classification:

F02B 75/28
F16J 1/08
F01M 9/00

US Classification:

123 51 R, 92159

Abstract:

An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port.

US Patent:

20130199503, Aug 8, 2013

Filed:

Feb 2, 2012

Appl. No.:

13/385127

Inventors:

Brian J. Callahan - San Diego CA, US
Eric P. Dion - Encinitas CA, US
Harold E. McCormick - Ballwin MO, US

Assignee:

Achates Power, Inc. - San Diego CA

International Classification:

F02F 1/20
F16J 10/02
B23P 17/00
F02B 75/28

US Classification:

123 51 R, 1231932, 92155, 29888061

Abstract:

A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore.

US Patent:

20180045135, Feb 15, 2018

Filed:

Sep 27, 2016

Appl. No.:

15/277930

Inventors:

- San Diego CA, US
BRIAN J. CALLAHAN - SAN DIEGO CA, US

Assignee:

ACHATES POWER, INC. - San Diego CA

International Classification:

F02F 1/18
G06F 17/50
F02B 75/28

Abstract:

A port opening edge shape for a port in a cylinder of an opposed-piston combustion engine is optimized for flow area, as well as for minimization of piston ring clipping. The port opening edge shape includes a top edge, a bottom edge, a first and second side edge connecting the top and bottom edge, and an apex in the top edge. The apex has the minimum radius of curvature of the port opening edge shape. A spline that defines the port opening edge shape can be calculated based upon a maximum height, a full width, an amount or degree of skew, and a minimum radius of curvature. A model can measure values for engine performance and determine which spline defines a port opening edge shape yields a desired engine performance.

US Patent:

20180045136, Feb 15, 2018

Filed:

Aug 9, 2016

Appl. No.:

15/232183

Inventors:

- San Diego CA, US
BRIAN J. CALLAHAN - San Diego CA, US

Assignee:

ACHATES POWER, INC. - San Diego CA

International Classification:

F02F 1/22
G06F 17/50
F02F 1/18

Abstract:

A port opening edge shape for a port in a cylinder of an opposed-piston combustion engine is optimized for flow area, as well as for minimization of piston ring clipping. The port opening edge shape includes a top edge, a bottom edge, a first and second side edge connecting the top and bottom edge, and an apex in the top edge. The apex has the minimum radius of curvature of the port opening edge shape. A spline that defines the port opening edge shape can be calculated based upon a maximum height, a full width, an amount or degree of skew, and a minimum radius of curvature. A model can measure values for engine performance and determine which spline defines a port opening edge shape yields a desired engine performance.

US Patent:

20170321591, Nov 9, 2017

Filed:

May 3, 2016

Appl. No.:

15/145705

Inventors:

- San Diego CA, US
BRIAN J. CALLAHAN - San Diego CA, US
KEVIN B. FUQUA - San Marcos CA, US
CHRISTOPHER J. KALEBJIAN - Columbus MI, US

Assignee:

ACHATES POWER, INC. - San Diego CA

International Classification:

F01N 13/10
F02B 75/28
F02B 25/08

Abstract:

A configuration for a uniflow-scavenged, opposed-piston engine reduces exhaust cross-talk caused by mass flow between cylinders resulting from one cylinder having an open exhaust port during scavenging and/or charging while an adjacent cylinder is undergoing blowdown. Some configurations include a wall or other barrier feature between cylinders that are adjacent to each other and fire one after the other. Additionally, or alternatively, some engine configurations include cylinders with intake and exhaust ports sized so that there is an overlap in crank angle of two or more cylinders having open exhaust ports of about 65 crank angle degrees or less.