Rangarajan (Ranga) Sourirajan - Founder & Member


Ph: 301.503.3361


J.D., Georgetown University

M.S. (ME), University of North Carolina at Charlotte

B.S. (ME), Indian Institute of Technology, Madras


Maryland, District of Columbia

U.S. Dist. Courts for D.C., Md., E.D. Tex., N.D. Tex.

U.S. Patent and Trademark Office


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. He served as an intern for Hon. Richard Linn (Fed. Cir.) and Hon. Ricardo Urbina (D.D.C.).


VP & General Counsel, Technology for Science, LLC

Special Assistant U.S. Attorney, U.S. Attorney's Office for DC

Associate, McKool Smith, PC

Associate, Dickstein Shapiro, LLP

Representative Matters

CleanRobotics, Inc. v. Trashbots, Inc., Nos. 91269665, -9666 (TTAB June 2, 2021) - Lead counsel for applicant in trademark oppositions concerning applicant's TRASHBOTS marks.

Sinjimoru v. Geneze Innovation Inc. - Lead counsel for petitioner in IPR review of US10,455,927.

Pereira, et al. v. Barrie School, No. 478741-V (Md. Cir. Ct. 2020) - Lead counsel for plaintiffs in breach of contract and invasion of privacy action.

Puma SE v. Doosan Machine Tools Co., Ltd., No. 91251170 (TTAB Sept. 24, 2019) - Lead counsel for applicant in trademark opposition concerning applicant's PUMA mark for CNCs.

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