Inventor · disambiguated record
Brian J. Callahan
Also filed as: CALLAHAN BRIAN · CALLAHAN BRIAN J
10 granted patents·944 citations·filing 2000–2016
91Inventor score
Top patents by PatentIndex Score
10 records- 0195US6496802B1System and method for providing access to electronic worksMP3 COM INC·Filed 2000·Granted Dec 17, 2002·450 cites·39 claims
- 0294US6609105B2System and method for providing access to electronic worksMP3 COM INC·Filed 2001·Granted Aug 19, 2003·258 cites·51 claims
- 0390US7376581B2System and method for providing access to electronic worksUNIVERSAL MUSIC GROUP INC·Filed 2002·Granted May 20, 2008·85 cites·19 claims
- 0490US6904410B1Online method and system for management of collectiblesHAVENEED COM INC·Filed 2000·Granted Jun 7, 2005·130 cites·21 claims
- 0588US9482153B2Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston enginesBETHEL STEVEN J·Filed 2011·Granted Nov 1, 2016·9 cites·19 claims
- 0688US8851029B2Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zonesCALLAHAN BRIAN J·Filed 2012·Granted Oct 7, 2014·7 cites·13 claims
- 0781US9068498B2Reduction of ring clipping in two-stroke cycle enginesACHATES POWER INC·Filed 2013·Granted Jun 30, 2015·5 cites·15 claims
- 0848US10082099B2Port edge shape with continuous curvature for improved ring-port interaction and flow areaACHATES POWER INC·Filed 2016·Granted Sep 25, 2018·0 cites·5 claims
- 0947US10323563B2Open exhaust chamber constructions for opposed-piston enginesACHATES POWER INC·Filed 2016·Granted Jun 18, 2019·0 cites·12 claims
- 1041US10215129B2Port edge shape with continuous curvature for improved ring-port interaction and flow areaACHATES POWER INC·Filed 2016·Granted Feb 26, 2019·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →