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For the Inventor, By the Inventor

San Diego, CA, United States of America

Brian J Callahan

This inventor holds 9 USPTO granted patents and 1 published patent application. Top assignees: Achates Power, Inc., Mp3.com, Inc., Universal Music Group, Inc.. Active years: 2002-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Brian J Callahan. Retrieved from https://idiyas.com/inventor/brian-j-callahan

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 9 

% Patents Active = 100.0

Average Co-Inventor Count = 2.2

ph-index = 5

Forward Citations = 629(Granted Patents)


Company Filing History:

goldMedal6 out of 143 
 
Achates Power, Inc.
 patents
silverMedal2 out of 2 
 
Mp3.com, Inc.
 patents
bronzeMedal1 out of 7 
 
Universal Music Group, Inc.
 patents

Years Active: 2002-2019

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9 patents (USPTO):Explore Patents
1. 10323563 - Open exhaust chamber constructions for opposed-piston engines (2019-06-18),
2. 10215129 - Port edge shape with continuous curvature for improved ring-port interaction and flow area (2019-02-26),
3. 10082099 - Port edge shape with continuous curvature for improved ring-port interaction and flow area (2018-09-25),
4. 9482153 - Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines (2016-11-01),
5. 9068498 - Reduction of ring clipping in two-stroke cycle engines (2015-06-30),
6. 8851029 - Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones (2014-10-07),
7. 7376581 - System and method for providing access to electronic works (2008-05-20),
8. 6609105 - System and method for providing access to electronic works (2003-08-19),
9. 6496802 - System and method for providing access to electronic works (2002-12-17),

Title: Brian J Callahan: Innovator in Engine Technology

Introduction

Brian J Callahan is a notable inventor based in San Diego, CA, with a focus on advancements in engine technology. He holds a total of 9 patents, showcasing his contributions to the field of opposed-piston engines. His innovative designs aim to enhance engine performance and efficiency.

Latest Patents

One of Callahan's latest patents involves open exhaust chamber constructions for opposed-piston engines. This configuration reduces exhaust cross-talk caused by mass flow between cylinders, particularly during scavenging and charging phases. The design includes barriers between adjacent cylinders that fire sequentially, optimizing the engine's operation. Another significant patent focuses on the port edge shape with continuous curvature for improved ring-port interaction and flow area. This design minimizes piston ring clipping while optimizing flow area, contributing to better engine performance.

Career Highlights

Throughout his career, Callahan has worked with prominent companies such as Achates Power, Inc. and Mp3.com, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in engine technology.

Collaborations

Callahan has collaborated with talented individuals in the industry, including Matthew John Dimeo and Brian Mason Degenhardt. These partnerships have further enriched his work and contributed to his success as an inventor.

Conclusion

Brian J Callahan's contributions to engine technology through his patents and collaborations highlight his role as an innovator in the field. His work continues to influence advancements in engine design and performance.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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