John D Vandenberg, Litigation Attorney in Portland, Oregon
Over 42 years of legal practice · focused on Litigation and Patent · 5.0/5 rating from 1 verified client review
MemberatKlarquist Sparkman Llp
Portland, OR
Practicing litigation in Portland since 1984.
- 42+
- Years practicing
- 5.0 ★
- 1 client review
- 3
- Bar admissions
Practices in
Are you John D Vandenberg?
This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.
Quick answer
John D Vandenberg is a member based in Portland, OR. The practice focuses on Litigation and Patent. John has over 42 years of legal experience. Currently practicing at Klarquist Sparkman Llp. Rated 5.0 out of 5 from 1 client review.
- Based in
- Portland, OR
- Experience
- over 42 years
- Known for
- Litigation · Patent
- Handles Litigation and Patent matters from Portland, OR.
- Over 42 years of practice as a licensed attorney.
- Recognized with AV Preeminent.
About John D Vandenberg: John D Vandenberg is a member based in Portland, OR. The practice focuses on Litigation and Patent. John has over 42 years of legal experience. Currently practicing at Klarquist Sparkman Llp. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Practice areas handled by John D Vandenberg
John concentrates on litigation and patent. Each area below outlines the kind of case John handles, typical outcomes to expect, and how the intake process starts.
Litigation cases in Portland, Oregon
John takes litigation matters in Portland, Oregon. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
Patent cases in Portland, Oregon
John takes patent matters in Portland, Oregon. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before John agrees to represent you.
Biography
About John D Vandenberg — Over 42 years of Oregon litigation experience
John D Vandenberg is a member based in Portland, OR. The practice focuses on Litigation and Patent. John has over 42 years of legal experience. Currently practicing at Klarquist Sparkman Llp. Rated 5.0 out of 5 from 1 client review.
John D Vandenberg is a lawyer practicing patent application, litigation, patents. John received a B.S.E. degree from Princeton University in 1979, and has been licensed for 42 years. John practices at Klarquist Sparkman, LLP in Portland, OR.
Working with John on a litigation matter
John D Vandenberg is a lawyer practicing patent application, litigation, patents. John received a B.S.E. degree from Princeton University in 1979, and has been licensed for 42 years. John practices at Klarquist Sparkman, LLP in Portland, OR.
Who John represents
John reviews new inquiries case-by-case for litigation and patent matters in Portland and the surrounding Oregon area.
Credentials
John D Vandenberg's legal education and bar admissions
New York University School of Law
J.D. · 1983
Princeton University
B.S.E. Mechanical · 1979
Jurisdictions
John's state bar admissions
Washington U.S. Cour
2006 · ACTIVE
Oregon
1989 · ACTIVE
New York
1984 · ACTIVE
John studied at J.D. in New York University School of Law and B.S.E. Mechanical in Princeton University.
Law school and academic background
John completed J.D. in New York University School of Law and B.S.E. Mechanical in Princeton University. Formal legal training is one signal of substantive knowledge — the day-to-day practice John runs in Oregon is where that training gets applied to real client questions.
Recognition
Awards, publications, and recognition of John D Vandenberg
John has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
AV Preeminent
Legal awards and honors
AV Preeminent.
Affiliations
John's professional memberships and bar associations
Oregon State Bar
membership
Locations
John D Vandenberg's office in Portland
John's primary office is at One World Trade Ctr., 121 S.W. Salmon St., Ste. 1600, Portland, OR, 97204. In-person meetings are by appointment; a phone intake usually comes first.
Klarquist Sparkman Llp
One World Trade Ctr., 121 S.W. Salmon St., Ste. 1600
Portland, OR 97204
Open in Google MapsClient feedback
Client reviews of John D Vandenberg — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of John. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing litigation attorneys in Portland.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once John D Vandenberg claims this profile.
Read all reviewsHiring guide
How to hire John D Vandenberg — what to expect in your first consultation
Working with a new litigation attorney should feel structured. Here's how the first two conversations with John usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
John charges for the initial consult. That fee is credited toward representation if you retain John's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; John will tell you what matters and what doesn't.
Questions to ask a litigation attorney in Portland, Oregon
A short list to run through before you commit: How many litigation matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for John
John discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in litigation practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every litigation matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. John confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
John's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many litigation practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about John D Vandenberg
How much does it cost to hire John for a litigation case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. John walks through the likely range during the consult so there are no surprises.
Does John offer a free consultation?
John charges for the initial consult; that fee is credited toward representation if you retain John's office. Some litigation attorneys offer free consults — check John's current terms during booking.
How long do litigation cases in Oregon typically take?
Simple litigation matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. John gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can John take my case if I'm outside Portland?
John is licensed in Oregon. Matters governed by Oregon law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — John will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with John?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. John will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is John accepting new litigation clients right now?
John's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Litigation attorneys serving Portland, Salem and Eugene in Oregon
John handles litigation matters throughout Oregon. Each city below is a direct link into the search page for verified litigation attorneys in that community.
More counsel
Other top-rated litigation attorneys in Oregon
If John's intake is full or the fit isn't right, these litigation attorneys in Portland handle similar matters. Every profile below is verified and open to consultations.





