Dr. Casimir counsels clients in all areas of intellectual property including patents, trademarks, copyrights, and trade secrets. A major focus of his practice is in the area of patent prosecution, post-issuance proceedings, litigation, litigation avoidance, due diligence, business counseling, and licensing with an emphasis in the biotechnology, pharmaceutical, chemical, medical device, and business methods fields.

Dr. Casimir has participated in the prosecution of over a thousand patent applications spanning topics such as molecular diagnostics, imaging systems, disease therapies, drugs, vaccines, drug delivery systems, research tools, enzymes, genes, artificial organs, transgenic animals, stem cells, nucleic acid synthesis, organic synthesis, multimedia information processing, material sciences, sensory substitution and enhancement, medical devices, nutraceuticals, ballistics systems, software, and Internet applications.

Dr. Casimir has worked with numerous small and large companies, universities, and institutes on all aspects of the intellectual property life cycle from procurement, post-issuance proceedings (re-examinations, re-issues, oppositions), strategic analysis, complex portfolio development, due diligence in funding rounds, IPOs, and mergers and acquisitions, licensing and negotiation, and litigation and dispute settlement.  Dr. Casimir has significant experience and expertise in managing large, complex patent portfolios and positioning such portfolios for withstanding scrutiny in litigation and due diligence analysis associated with funding or acquisition events.

Dr. Casimir has participated in numerous intellectual property lawsuits, representing both plaintiffs and defendants.  Dr. Casimir is also frequently engaged to provide freedom-to-operate opinions, including non-infringement and invalidity opinions.