John R. Posthumus
(303) 863-2963

1560 Broadway
Suite #1200
Denver, CO 80202

Mr. Posthumus is a technology lawyer with more than 25 years of experience litigating complex patent and trademark disputes and providing sophisticated IP counseling.

Mr. Posthumus has a national reputation for successfully and efficiently handling IP litigation matters, including jury and bench trials in federal courts across the U.S. He represents national and international companies in cases involving violations of patent, trademark, copyright and trade secrets. He is a lead enforcement counsel in trademark and unfair competition matters for an international real estate company. 

Mr. Posthumus also advises clients and transactional attorneys on IP matters in mergers and acquisitions, employment disputes and licensing negotiations, as well as provides strategic advice on intellectual property portfolio development and management.

Mr. Posthumus has been recognized by Colorado Super Lawyers Magazine as one of Colorado's "Super Lawyers" since 2009 and was recognized as a Colorado "Top 100 Super Lawyer" in 2014 through 2017.  He has been recognized by Chambers USA every year since 2009.  Mr. Posthumus is listed in the 2013 and 2014 editions of IAM Patent 1000 identifying the world’s leading patent practitioners.  He is AV® rated by Martindale-Hubbell, was selected as "Lawyer of the Year" in 2012 by Law Week Colorado, awarded “Top Thinker” for 2012 in the Business Category by the Denver Post, runner up for the “Denver Post Business Leader of the Year for 2012, awarded Powerbook Industry Leader in the Law Category for 2013 by the Denver Business Journal and awarded the Linn Inn Distinguished Service Medal in 2013 by The Richard Linn American Inn of Court.

Mr. Posthumus has served many leadership roles with the IP Section of the Colorado Bar Association and the International Trademark Association.  Due to his prominence in the Colorado Bar and the IP community nationally, John was a driving force behind Colorado’s successful effort to be selected as a location for one of the regional U.S. Patent and Trademark Offices.   It has been a passion project for John, resulting in countless hours of pro bono work, including many visits to Washington D.C. to meet with many senators, representatives, members of the Obama Administration, as well as leadership at the U.S. Patent and Trademark Office in Alexandria, Virginia.

Trademark and Copyright
Trade Secrets and Confidentiality
Technology Transactions and Licensing
Patent Litigation
Electrical Engineering
Computer Hardware and Software
Intellectual Property Litigation
Intellectual Property in Employment
Alternative Dispute Resolution

Franklin Pierce Law Center (J.D., 1991)

University of Colorado (B.S., Electrical Engineering and Computer Science, B.S., Business Administration, 1987)

United States Patent and Trademark Office, 1992

Colorado, 1991

International Trademark Association, Famous and Well-Known Marks Committee, 2016-17; International Amicus Committee, 2018-2019.

U.S. Amicus Subcommittee of the International Amicus Committee 2012-2015

Colorado Bar Association, Intellectual Property Section Chair, 2010-2011; Vice Chair, 2009-2010; Secretary & Treasurer, 2008-2009

Colorado Bar Association Foundation Fellow

Emerging Issues Committee – Issues Identification Subcommittee, 2010-2011; North America Subcommittee, 2006-2007; Defenses to Dilution Subcommittee 2004-2005

Dilution and Well-Known Marks Committee – North America Subcommittee, 2008-2009

Appointed to Special Task Force that Harmonized the Model State Trademark Bill with the Federal Trademark Dilution Revision Act, 2007

Disability Law Colorado: Member, Board of Directors and Executive Committee, 2008-present; Vice President of the Board, 2012-2013; President of the Board, 2014-2015

International Trademark Association

Bar Fellow, Colorado Bar Foundation

Best Lawyers® in America, 2018

Managing IP Stars, 2015

IAM Patent 1000, 2015-2016

Awarded 2015 Metropolitan Cooperation Award by Metro Denver Economic Development Corporation.

Colorado Super Lawyers, 2009 - 2017, including Top 100 Colorado Super Lawyers 2014-2017.

5280 Magazine Top Denver Attorneys, 2015-2018

Recognized by World Trademark Review, 2014-2018

Chambers & Partners USA Guide Leading Individual (Band 1), 2009 – 2017.

Linn Inn Distinguished Service Medal, 2013.

Recognized by IAM Patent 1000 in The World’s Leading Patent Practitioners, 2013.

Awarded “Top Thinker” in the Business category by the Denver Post, 2012.

Lawyer of the Year by Law Week Colorado, 2012.

Runner-Up Denver Post Business Leader of the Year, 2012.

Awarded Powerbook Industry Leader in Law Category by Denver Business Journal, 2012.

Recognized by Denver Business Journal’s “People to Watch,” 2012.

Martindale-Hubbell AV ® Preeminent™.

Speaker: "Colorado Rule of Professional Conduct 8.4," IP Section, Colorado Bar Association, Denver, Colorado, Aug. 29, 2017.

Panelist: "Leading Edge Challenges: Amendments at PTAB," Federal Circuit Bar Association, February 17, 2017.

Moderator: PTAB TRIALS: A Live PTAB Hearing at the AIPLA Annual Meeting; October, 2016.

Moderator: "What AI, Analytics, and Machine Learning Mean for the Future of Intellectual Property Law," Intellectual Property Law Section Luncheon, Colorado Bar Association, October, 2016.

Moderator: "IP Section Town Hall: Does Section 101 Merit a Legislative Change?" Intellectual Property Law Section Luncheon, Colorado Bar Association, May, 2016,

Profiled: Super Lawyers Magazine, “Patent Office No Longer Pending,” April 2015.

Speaker: "Update Re: Rocky Mountain Regional Office of the US Patent and Trademark Office," American Chemical Society National Conference, Denver, Colorado, 2015.

Quoted, "New Patent Office Creating Historic Innovation Hub in Denver," Confluence Denver, Sept. 17, 2014.

Quoted, "The PTO Goes to Denver, Thanks to John Posthumus," Corporate Counsel, July 10, 2014.

Quoted, New U.S. Patent and Trademark Office Positions Colorado as National Innovation Hub, Inside Counsel, July 2, 2014.

Mentioned, "USPTO Denver Office Opens Amid High Hopes, Managing IP, June 30, 2014.

Quoted, "PTO Opens Satellite Office in Denver," Patent, Trademark & Copyright Journal, June 30, 2014.

Author, "Opening of the Rocky Mountain Patent Office Raises Denver's Profile as Center of Innovation, Patently-O, June 29, 2014.

Quoted, "West Coast Attorneys Have High Hopes for New USPTO Office," Law360, June 24, 2014.

Quoted, "Steve Jobs Patents Exhibits Opens in Denver just days Before new Patent Office," Denver Business Journal, June 20, 2014.

Quoted, "Cover Story: Denver's Patent Office Expected to Speed Innovation," Denver Business Journal, June 13, 2014.

Presenter: US Patent and Trademark Office Opens in Denver -A Milestone Moment for the Region, City Club of Denver, April 2, 2013.

Presenter, The Rotary Club of Denver, “Denver Branch of the U.S. Patent Office,” September 26, 2013.

Presenter, US Patent and Trademark Office Opens in Denver, “A Milestone Moment for the Region,” April 2, 2013.

Quoted, “Spring Cleaning: some items we’d like to sweep away this season,” The Denver Post, May 26, 2013.

Honored, “Colorado’s top thinkers of 2012: Business,” The Denver Post, January 13, 2013.

Quoted, “Patent office to open temporary branch January 2 in Lakewood, Denver Business Journal, December 21, 2012.

Mentioned, “Colorado will soon be a player in the patent wars,” Denver Westword, November 8, 2012.

Mentioned, “Speaker: Patent office to boost innovation job creation,” Colorado Springs, The Gazette, October 24, 2012.

Mentioned, “John Posthumus helped Denver land new patent office,”Denver Business Journal: 2012 Power Book, October 19, 2012.

Quoted, “IP Growth Reflects Shift In State’s Economy,” Law Week Colorado, October 15, 2012.

Quoted, “Patent Office To Help Counsel, Economy Grow,” Law Week Colorado, July 9 ,2012.

Quoted, “Selection of Denver is a patently good move,” The Colorado Statesman, July 6, 2012.

Leader of Patent-Office push says Denver's win will spur tech, jobs, Denver Business Journal, July 1, 2012.

Denver's soon-to-be built patent office will generate $440 million, Denver Post, July 2, 2012.

Patent office could generate new jobs, $400 million for Colorado, Fox 31 News, June 8, 2012.

Co-author with Senator Michael Bennet, “Put Patent Office in Colorado,” Denver Post, March 9, 2012.

Quoted, “Colorado in Running for U.S. Patent Office,” Denver Post, January 31, 2012.

John Posthumus selected to International Trademark Association Committee for 2016-17. read more

One Year In, Patent Office Elevating Denver

John Posthumus talks with Law Week Colorado (May 18, 2015) about the impact of the opening of the USPTO Denver satellite one year ago and what opportunities lie ahead in the coming full article.

Confluence Denver: New Patent Office Creating Historic Innovation Hub in Denver

Sept. 17, 2014 -- The official opening of the new U.S. Patent and Trademark Office in Denver -- the first such facility west of the Mississippi River -- is creating outlets and opportunities for innovators, entrepreneurs and others with great ideas..."It shines a pretty big bright light on what's going on here in Colorado," says John Posthumus, an attorney with the Denver-based Sheridan Ross P.C. "Innovation occurs everywhere, we should be going to where the innovation is going." more