Patents Intellectual property Prosecution Litigation


Shiells Law Firm P.C. was founded in 2011 by Theodore F. Shiells, who brings more than 30 years of experience in intellectual property law, including as a partner in large law firms in New York and Texas.  He is licensed to practice in Texas, New York and California and is a Registered Patent Attorney in the United States Patent and Trademark Office.  

The firm obtains patents, trademarks, and copyrights for its clients, litigates those matters in the courts, negotiates license agreements and counsels clients on all aspects of intellectual property law. Shiells Law Firm is one of just a few firms experienced in Inter Partes Review ("IPR") proceedings in the Patent Trial and Appeals Board ("PTAB").

Shiells Law Firm's attorneys are experienced in a wide range of technology, including optical biosensors, nanotechnology, advanced helicopter and military image processing systems, telecommunications systems, sport equipment, and solar powered consumer lighting products. The firm regularly litigates patent, trademark and copyright infringement cases in Texas and throught the United States. 

Various of the attorneys practicing with the firm are members of the United States Supreme Court, Federal Circuit Court of Appeals, Ninth Circuit Court of Appeals, and United States District Courts in Texas, New York, California and other states and are Registered Patent Attorneys in the United States Patent and Trademark Office.

Mr. Shiells is A.V. Preeminant Rated by Martindale-Hubbell.   

Focusing on Intellectual Property in the following areas:




International Patents

Entertainment law

Trial and Appellate Litigation


Trade Secrets

Fields of Expertise:

Agriculture & Energy

Computer & Technology


Life Sciences

Patent law

Intellectual property


Green Technology

Medical Devices




  • Adventive IDEAS LLC
  • Apakau, LLC
  • Avant-Garde Marketing Solutions, Inc.
  • Drucker Laboratories
  • Jaboneria Marianella Soap
  • Lowe's Market
  • Purvis Industries, Inc.

  • Resonant Optics Incorporated
  • TC Fuels, Inc.
  • Value Centered Innovation Enablement Services Pvt. Ltd
  • Vendio Services, Inc. (subsidiary of Alibaba, Inc.)
  • FitDot, Inc. 
  • University of Texas