Jae Hahn, Ph.D.

Technical Areas

Mechanical engineering

Electrical engineering

Computer science

Biomedical devices

Health informatics

Professional Services



Rangarajan Sourirajan, Esq., M.S.

Patent Attorney, Of Counsel

Ranga Sourirajan focuses his practice on intellectual property and contracts matters.  He assists startups and small businesses in patent litigation, patent and trademark procurement, contracts, licensing, due diligence and opinion writing in electrical engineering, computer science, biomedical devices, health informatics and mechanical arts.


J.D., Georgetown University

M.S. in mechanical engineering, University of North Carolina at Charlotte

B.S. in mechanical engineering, Indian Institute of Technology, Madras

Representative Matters

Realtime Data LLC v. Vembu Tech., Inc., No. 6:16-cv-1037 (E.D. Tex. July 22, 2016) – Lead counsel for defendant in patent litigation concerning data compression.
Mozly Tech. LLC v. Zoho Corp.
, No. 2:15-cv-1888-JRG, -1904 (E.D. Tex. Nov. 30, 2015) – Lead counsel for defendant Zoho in patent litigation concerning contact information.
St. Francis Health Care v. Zimmerman, et al., Inv. No. 08-L-13158 (Ill. Jan. 4, 2010) – Lead counsel for defendant in contract dispute.
Certain MLC Flash Memory Devices and Products Containing Same, Inv. No. 337-TA-683 (July 27, 2009) – Represented petitioner in patent litigation concerning MLC.
Mirror Imaging LLC v. SunTrust Banks Inc., et al., No. 2:08-cv-295 (E.D. Tex. July 29, 2008) – Represented defendant in patent litigation concerning check storage system.
FotoMedia Technologies, LLC v. AOL LLC, et al., No. 2:07-cv-255 (E.D. Tex. Jun. 19, 2007) – Represented plaintiff in patent litigation concerning photosharing.
Certain Endoscopic Probes for Use in Argon Plasma Coagulation Sys., Inv. No. 337-TA-569 (Apr. 10, 2006) – Represented respondent Erbe in litigation concerning endoscopic probes.
Synopsys, Inc. v. Ricoh Co., Ltd., No. 5:03-cv-2289 (N.D. Cal. 2003) – Represented defendant Ricoh in patent litigation concerning ASIC.
Camris Int’l, Inc. v. Wehelie, No. 287754-cv (Md. Cir.)
U.S. Radiology On-Call LLC v. Camris Int’l, Inc., AAA Case No. 72 193 00201 08 

Bar Admissions

Maryland, 2006

District of Columbia, 2007

U.S. Dist. Court for D.C., 2009

U.S. Dist. Court for E.D. Tex., 2015

U.S. Dist. Court for N.D. Tex., 2016

U.S. Patent and Trademark Office, 2007