Intellectual Property Attorneys - Prass LLP


Attorney Bios

Ron PrassRonald E. Prass, Jr

Ron Prass has extensive experience in all major aspects of patent law, including patent
preparation and prosecution, patentability opinions, and litigation. In addition, Ron has technical
expertise in electrical engineering and computer software and hardware.

Ron’s particular technical expertise covers a wide variety of highly-technical subject matter,
including software, computer networking, wireless communications, telephone networks, image
processing, computer security, semiconductors, printers and copiers, projectors, cameras, speech
recognition and automated dialog systems, handheld processing devices, xerography,
cryptography, control systems, database management software, caching, DVD technology,
cellular telephony, fiber optics, automobiles, medical devices, automobile navigation and
transmission systems, computer data storage devices, and Internet-related technologies.
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Ellis B. Ramirez

Ellis Ramirez has extensive experience in all aspects of patent law, including patent preparation
and prosecution; patentability, validity, infringement, and due diligence opinions; strategic patent
portfolio development and management; and patent litigation. He also has technical expertise in
the areas of electrical engineering, computer engineering, computer software, and mechanical

Ellis’s particular technical expertise covers a variety of highly competitive technologies,
including microprocessors; telecommunications; online commerce; image processing; simulation
and modeling; network communication; artificial intelligence; medical imaging; power
management; and interactive entertainment.
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Stuart SmithStuart I. Smith

Stuart Smith has extensive experience in many aspects of patent law, including utility and design patent preparation and prosecution, patentability and infringement opinions, due diligence reviews, and patent portfolio management. Prior to pursuing a career in patent law, Stuartpractice law in the field of construction litigation.

Stuart has experience in a wide variety of technical areas, including manufacturing equipment, photocopier systems, ink jet and laser printing systems, image processing systems, domestic appliances, medical devices, weapon systems, systems for processing materials using explosive forces, motorcycle parts, automotive systems including hybrid transmission systems, automotive tires, electric power systems, gas turbines, wild game attraction devices, business methods, magnetic transmission systems, and electric motors.
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Stuart SmithRichard A. Castellano

Richard A. Castellano has extensive experience in all aspects of patent law, including legal opinions pertaining to infringement, validity, freedom-to-operate, and licensing, strategic intellectual property counseling, patent reexamination and post-grant work, patent litigation in various U.S. federal district courts and the U.S. International Trade Commission, and drafting and prosecuting utility and design patent applications. Rich also has extensive appellate experience representing numerous clients before the Patent Trial and Appeal Board, its predecessor, the Board of Patent Appeals and Interferences, and the Trademark Trial and Appeal Board.

Rich has a background in chemistry and biochemistry, and has prosecution and litigation experience in the chemical and chemical process arts pertaining to inks, pharmaceuticals, and cosmetics. In addition to his chemical background, Rich has extensive prosecution and litigation experience related to a wide variety of technical fields including medical devices, renewable energy and clean technology, nanotechnology, printing technology, semiconductors and semiconductor processing, computers, software and internet-related technologies, automation and control systems, security, telecommunications, networks and particularly wireless networks, data storage, display systems, gaming software and hardware, imaging, optics, heat exchange systems, automotive, industrial and manufacturing equipment, and consumer products.
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Dan TannerDaniel A. Tanner, III

Dan Tanner has extensive experience in the full range of patent development, acquisition, defense and enforcement services. Dan has represented a large and diverse group of U.S. and international clients, from large multi-national corporations to individual inventors and entrepreneurs. Dan is available to provide all manner of strategic client portfolio counseling, including comprehensive legal opinions on patent validity, patent infringement, patentability, freedom to operate, and licensing. Dan's widely-varied technical areas of expertise with mechanical and electrical inventions include: gas turbine engines; hybrid vehicle and electric vehicles; image forming devices; aircraft preflight planning and flight crew coordination methods and support systems; voice and data acquisition systems; communications; personal security identification; document security; aerial system collision avoidance systems and enhancements for unmanned aerial vehicles; HVAC&R systems, particularly for large computer data centers; and medical devices including in the areas of RF electrosurgery, stents and intravenous drug delivery.

Dan's patent litigation experience includes drafting complex expert reports, detailed briefs in support of
Motions for Summary Judgment, and Markman briefs. Dan has led detailed document review efforts in
complex litigation matters, and has prepared numerous fact and expert witnesses for deposition
and trial testimony. Dan was the lead associate for representation of an international client including
successfully resolving binding arbitration matters before an arbitration panel of three retired judges.
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David TranDavid Tran
Of Counsel

David Tran is Of Counsel with Prass, LLP. David isregistered with the Patent and Trademarks Office (USPTO) and is licensed to practice law in California. David'sIntellectual Property law practice includes patent preparation, prosecution and strategic IP counseling including portfolio development, due diligence, validity and non-infringement opinions, freedom to operate, and international patent prosecution.

David has prosecuted patents for many major corporations and start-up companies located in Silicon Valley in the areas of computer architecture, network communication, low-power mobile computing, storage technology, online marketplaces, social networking, databases, e-commerce, electronic payments, broadcast communication, medical devices, operating systems, and other software-related technologies.
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