More about the SDIPLA

If you have any questions about SDIPLA please contact one of our current officers.
If you have any concerns about this website, please contact Jo Dale Carothers.

Meet Our Current Officers



Desmond O’Sullivan | 858.314.7794 |
Of Counsel, Morrison & Foerster, LLP

Desmond O’Sullivan is an associate in the Intellectual Property Group of Morrison & Foerster’s San Diego office. Mr. O’Sullivan assists clients in procuring patents before the U.S. Patent and Trademark Office (PTO), litigating patents before U.S. district courts, defending and attacking patents before the Patent Trial and Appeals Board, and evaluating patents and other intellectual property in corporate transactions. Mr. O’Sullivan’s clients include multinational, domestic, and startup companies providing solutions in telecommunications, alternative energy, aviation, engines, consumer electronics, laser systems, semiconductors, codecs, and medical devices.

Mr. O’Sullivan received his J.D. from Hastings College of the Law, where he was an articles editor for the Hastings Law Journal and served as a judicial extern for the Honorable Vaughn R. Walker of the Northern District of California. Mr. O’Sullivan received his B.Sc. in mathematics and applied mathematics from University College Cork in Cork, Ireland. He received his M.S.E. in engineering sciences from the University of California, San Diego, where he focused on aerospace and mechanical engineering.


Justin Gray | 858.847.6700 |
Senior Counsel, Foley & Lardner LLP

Justin E. Gray is Senior Counsel in the IP Litigation Practice of Foley & Lardner’s San Diego office. Mr. Gray’s practice focuses on patent litigation matters for technology companies on cases involving smartphones, software, and medical devices. Mr. Gray graduated from the Northwestern University School of Law (J.D., cum laude, 2006), where he was a staff member and symposium editor for the Northwestern Journal of Technology and Intellectual Property. Prior to that, Mr. Gray obtained a degree in computer science and mathematics from the University of Wisconsin – Madison (B.S., with distinction, 2003).

Mr. Gray also is a charter member of the Richard Linn American Inn of Court. He has served as an adjunct professor at the Northwestern University School of Law, where he taught patent law. In 2011, he received the firm’s IP Founders award, recognizing his service to his clients, his colleagues, and the firm. Mr. Gray is also the creator and sole author of Gray of Claims, a blog devoted to exploring patent claim construction and related issues.


Nathanael R. Luman, Ph.D. | 858.707.4000 |
Partner, Knobbe Martens LLP.

Nathanael R. Luman, Ph.D., is a partner in the San Diego offices of Knobbe Martens LLP.  Nate represents chemical and pharmaceutical companies in intellectual property matters. He is actively involved in Inter Partes Review (IPR) proceedings before the Patent Trial and Appeal Board.  In addition, he has litigated cases under the Hatch-Waxman Act and counseled generic pharmaceutical companies with respect to the Abbreviated New Drug Application (ANDA) process.

Nate develops patent portfolios for companies.  His expertise includes strategic patent procurement, analyzing third-party patents, conducting due diligence studies, and preparing opinions on patent validity and freedom-to-operate issues. In 2012, Nate served as a law clerk to the Honorable Marilyn L. Huff of the U.S. District Court for the Southern District of California. He worked on numerous patent litigation cases during his clerkship. He is admitted to the State Bar of California and registered to practice before the U.S. Patent and Trademark Office. He received his law degree, with honors, from the University of San Diego School of Law.

Nate earned his doctoral degree in chemistry from Boston University, where his work involved the synthesis and characterization of biodegradable molecules and macromolecules. His research has been published in a variety of scientific journals, including The Journal of the American Chemical Society, Organic Letters, and Pure & Applied Chemistry.


Bruce Greenhaus,

Bruce W. Greenhaus |
Partner with Jaquez Land Greenhaus LLP

Bruce is a founding partner of the patent law firm of Jaquez Land Greenhaus LLP. The firm is a full-service IP firm with three partners, each having over 28 years of experience in all aspects of IP law, specializing in prosecution, licensing and litigation support related to electrical patents.

He was formerly with Qualcomm for 10 years, the last five as Vice President, Patent Counsel. I have been practicing patent law in San Diego since 1991 as an associate with the law firm of Spensley Horn Jubas & Lubitz and then in 1995, with the firm of Baker, Maxham, Jester, & Meador.

He was Vice President, Chief Patent Counsel at Entropic Communications, Inc, where he worked from Dec. of 2007 until joining forces with Marty Jaquez and John Land, my former associates at Spensley Horn. He has been an adjunct professor with Thomas Jefferson School of Law (TJLS). At TJLS, he taught patent law classes on claim drafting, litigation, and claim interpretation.

He was Co-Chair of the CommNexus Intellectual Property Special Interest Group (IP SIG) and a member of the San Diego Intellectual Property Law Association (SDIPLA). He is a past president of the SDIPLA, where he spent five years on the Board.


Bernard J. Greenspan, Ph. D. | 858.442.8152 |
Principal at Greenspan IP Management.

Dr. Greenspan provides consultation on IP strategy to life science, biotech, and medical device companies. He has over 17 years of experience in developing strategies, managing IP portfolios, due diligence, and establishing in-house IP training programs. He received his BA in physics from Clark University and his MS and Ph.D. in biophysics from the University of Rochester School of Medicine and Dentistry. He is registered to practice at the USPTO as a patent agent, and is an instructor in the IP Certificate program at UCSD Extension.

Bernie held positions as Senior Director of IP at Prometheus Laboratories, Director of IP Strategy Management for Pfizer La Jolla Laboratories, Senior Director of Intellectual Property at Verus Pharmaceuticals, and as an independent consultant to life science and medical device companies. Before moving into IP, he was actively engaged for 20 years in aerosol science and respiratory drug delivery research. His research positions have included Director of Aerosol Research at Dura Pharmaceuticals and Elan Pharmaceuticals, and Staff Scientist at Battelle Pacific Northwest National Laboratory.

The SDIPLA Past Presidents

Everett N. Curtis (1956-57)
Walter J. Jason (1957-58)
Egon W. Mueller (1958-59)
Warren H.F. Schmieding (1959-60)
George E Pearson (1960-61)
Roy L. Knox (1961-62)
Carl R. Brown (1962-63)
Earl F. Karts (1963-64)
Vincent E. Sullivan (1964-65)
George E. Pearson (1965-66)
Carl R. Brown (1966-67)
J. Peter Mohn (1967-68)
Nell F. Martin (1968-69)
Thomas G. Keough (1969-70)
Thomas D. Lane (1970-71)
John R. Duncan (1971-72)
George J. Rubens (1972-73)
Frank D. Gilliam (1973-74)
Patrick J. Schlesinger (1974-75)
Ralph S. Branscomb(1975-76)
Charles C. Logan (1976-77)
Nell F. Martin (1977-78)
Henri J.A Charmasson (1978-79)
John L. Haller (1979-80)
Edward W. Callan (1980-81)
Mervyn L. Young (1981)
Freling E. Baker (1981-82)
Charles Fassbender (1983-84)
Michael H. Jester (1984-85)
Natalie Jensen (1985-86)
Lawrence A. Maxham (1986-87)
John R. Lindsay (1987-88)

R. Ben Miller (1988-89)
J.F. McLellan (1989-90)
John R. Ross. Jr. (1990-91)
Jim McClain (1991-92)
April Logan (1992-93)
Nancy Dahl (1993-94)
Anita M. Kirkpatrick (1994-95)
Kathleen A. Pasulka (1995-96)
Laurie A. Axford (1996-97)
Lisa Haile (1997-98)
Susan Perkins (1998)
Lisa Haile (1999)
Bruce Greenhaus (1999-2000)
Stephen Korniczky (2000-01)
Sam Talpalatsky (2001-02)
Richard Kim (2002-03)
Mark D. Wieczorek (2003-04)
Vicki G. Norton (2004-05)
Kent M. Walker (2005-06)
Robert Prince (2006-07)
Tom Coverstone (2007-08)
Boris Zelkind (2008-09)
Jessica S. Mitchell (2009-10)
John E. Peterson, PhD (2010-11)
Kenneth Jenkins, Ph.D. (2011-2012)
Kurt Kjelland (2012-2103)
Marc Morley (2013-2014)
JoDale Carothers (2014-2015)
Les Overman (2015-2016)
Shawn McDonald (2016-2017)
Rose Thiessen (2017-2018)
Bernard J. Greenspan (2018-2019)