Rangarajan Sourirajan, Esq., M.S.

Patent Attorney, Of Counsel

phone  410-872-1123 (work)
fax 240-366-1263


Technical Areas

  • Materialselectrical engineering
  • Computer science
  • Biomedical devices
  • Health informatics
  • Mechanical arts


  • J.D., Georgetown University
  • M.S., University of North Carolina at Charlotte
  • B.S., Indian Institute of Technology, Madras

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

Professional Experience

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.

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
Presentations and Publications
Speaker, "Recent U.S. Agency Decisions and Rules," Global IP Convention 2014, Hyderabad, India (Jan. 2014)
Speaker, "Patent Damages," AIPLA's IP Practice in Japan Committee, Annual Pre-Meeting, Washington, DC (Oct. 2013)
Participant (Q&A), ABA's Law Student Division 11th Circuit Spring Meeting, Georgetown University, Washington, DC (Feb. 2012)
Panelist, ABA's Law Student Division 11th Circuit Spring Meeting, Howard University, Washington, DC (Feb. 2010)
Speaker, "Are Reverse Payment Settlements on Reverse Gear?," AIPLA's IP Practice in Japan Committee, Annual Pre-Meeting, Washington, DC (Oct. 2009)
Co-author, “Coverage for IP-Related Risks,” Intellectual Property Counselor, Issue No. 149:1-6 (May 2009)   
Speaker, "2008 Federal Circuit Update," AIPLA's IP Practice in Japan Committee, MWI Pre-Meeting, Miami (Jan. 2009)
Speaker, "Would the Federal Circuit Rebuff Egyptian Goddess' 'Non-Trivial Advance[s]'?," AIPLA's IP Practice in Japan Committee, MWI Pre-Meeting, Phoenix (Jan. 2008)
Co-author, Intellectual Property Primer: Patents, Trademarks, Copyrights, and Trade Secrets for In-House Counsel, Association of Corporate Counsel (3d ed. 2008)