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About me

With approximately twenty years of experience in patent prosecution (the process of getting a patent application), I take pride in being able to offer creative solutions to clients' real needs.  I will work with you to meet your patent goals.


I help obtain patent protection for software, business methods, mechanical devices, and electrical apparatus. My services range from writing the patent application, to responding to Office actions from the United States Patent and Trademark Office, to obtaining and maintaining an issued patent.  I also help clients determine patentability and whether their product would infringe the intellectual property of others.


I am licensed to practice before the U.S. Patent and Trademark Office as well as in Oregon and California.  I represent clients from all over the world.


Practice areas


  1. Patent Application: 75%
    23 years, 400 cases
  2. Patent Infringement: 15%
    23 years, 25 cases
  3. Intellectual Property: 10%
    23 years



Hourly ($250/hour), Fixed (sometimes), Free consultation (30 minutes)

Payment types:

Cash, Check

Attorney endorsements

3 total 

Are you an attorney? Endorse this lawyer

  • Maad Abu-Ghazalah

    I own a small business designing software for patent attorneys (as well as being a patent attorney myself) and I frequently use Karen as a reference when trying to decipher the nuances of IP Law and the operations of the US PTO. She's a very clear thinker and really knows her stuff, and I have greatly benefited from her input over the past ten years.


    Maad Abu-Ghazalah
    Relationship: Fellow lawyer in community

  • Mark Christopher Farrell

    Karen Oster gives good business advice. She knows how to assess a client's needs, whether the client is an individual person or a large corporation. Karen's patent documents are notable for their exquisite clarity, and her track record of successes is impressive. Her ability to stimulate a company's innovation and to provide a valuable Intellectual Property portfolio can be summed up in two words: "impressive" and "reliable."


    Mark Farrell Patent Application Attorney
    Relationship: Fellow lawyer in community

Contact info

PMB 506
16869 SW 65th Ave
Lake Oswego, OR, 97035

16869 65th Ave Pmb 506
Lake Oswego, OR, 97035



We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Preeminent AV ratingMartindale-Hubble2012
Senior MemberIEEE2011
Work experience
TitleCompany nameDuration
Patent AttorneyLaw Office of Karen Dana Oster, LLC2002 - Present
Patent AttorneyMiller Nash LLP1999 - 2001
Patent AttorneyChernoff, Vilhauer, McClung & Stenzel1994 - 1999
Patent AttorneyPoms, Smith, Lande & Rose1993 - 1994
Association namePosition nameDuration
Oregon State Bar, Computer and Internet Law SectionSecretary2010 - 2010
Institute of Electrical and Electronics EngineersIntellectual Property Committee2009 - Present
Oregon Patent Law AssociationExecutive Committee2009 - Present
National Association of Patent PractitionersMember2007 - Present
NW Patent NetworkMember2006 - Present
Oregon State Bar, Computer and Internet Law SectionExecutive Committee2004 - Present
Oregon State Bar, Computer and Internet Law SectionMember2004 - Present
Oregon State Bar, Intellectual Property SectionChair2001 - 2001
Oregon State Bar, Intellectual Property SectionExecutive Committee1994 - 2002
Oregon State Bar Intellectual Property SectionMember1994 - Present
Institute of Electrical and Electronics EngineersMember1992 - Present
Legal cases
Case nameOutcome
Modular active test probe and removable tip module thereforIssued Patent
Pattern testing board and systemIssued Patent.
Method of discovering and installing clients for digital copier servicesPatent Issued
See all legal cases 
Publication nameTitleDate
Oregon State Bar Computer and Internet Law Section e-Commerce Deskbook“Patents and E-Commerce”2009
Federal Circuit Patent Case Digests published by West GroupFederal Circuit Patent Case Digests2001
School nameMajorDegreeGraduated
California State University, Long BeachComputer EngineeringBS - Bachelor of Science1992
Loyola Law School, Loyola Marymount UniversityLawJD - Juris Doctor1990
University of California - Santa BarbaraEnglishBA - Bachelor of Arts1987
Speaking engagements
Conference nameTitleDate
Portland Womens Legal - CLE PresentationWhat You and Your Clients Need To Know About Patent Reform2012
IEEE-USA webinarPatentability and Infringement: A Practical Guide for Understanding the Basics2010
Portland Womens Legal - CLE PresentationDevelopments in Patent Law2009
GameStormAltenatives for Patent Protection2009
Oregon State Bar Computer Law Section Annual CLESoftware Patent Basics2002
ORCNET MeetingProtecting Intellectual Property Using Patents, Copyrights, Trademarks, and Trade Secrets2000