Hongsun Yoon, IP Attorney in Washington, District of Columbia
Over 24 years of legal practice · focused on IP, Patent, and Trademark
Sr. IP Coun.
Washington, DC
Practicing ip in Washington since 2002.
- 24+
- Years practicing
- 2
- Bar admissions
Are you Hongsun Yoon?
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
Hongsun Yoon is a sr. ip coun. based in Washington, DC. The practice focuses on IP, Patent, and Trademark. Hongsun has over 24 years of legal experience.
- Based in
- Washington, DC
- Experience
- over 24 years
- Known for
- IP · Patent · Trademark
- Handles IP, Patent, and Trademark matters from Washington, DC.
- Over 24 years of practice as a licensed attorney.
About Hongsun Yoon: Hongsun Yoon is a sr. ip coun. based in Washington, DC. The practice focuses on IP, Patent, and Trademark. Hongsun has over 24 years of legal experience.
Areas of practice
Hongsun's practice areas in Washington
Hongsun concentrates on ip, patent, and trademark. Each area below outlines the kind of case Hongsun handles, typical outcomes to expect, and how the intake process starts.
IP cases in Washington, District of Columbia
Hongsun takes ip matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Hongsun agrees to represent you.
Patent cases in Washington, District of Columbia
Hongsun takes patent matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Hongsun agrees to represent you.
Trademark cases in Washington, District of Columbia
Hongsun takes trademark matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Hongsun agrees to represent you.
Biography
Hongsun Yoon, ip attorney serving Washington
Hongsun Yoon is a sr. ip coun. based in Washington, DC. The practice focuses on IP, Patent, and Trademark. Hongsun has over 24 years of legal experience. Hongsun works from Washington, District of Columbia and takes on ip matters across the region.
Hongsun Yoon is a lawyer practicing intellectual property litigation, patent portfolio management, licensing and 2 other areas of law. Hongsun received a B.S. degree from Indiana University in 1999, and has been licensed for 24 years. Hongsun practices in Washington, DC.
Hongsun's approach to ip cases
Hongsun Yoon is a lawyer practicing intellectual property litigation, patent portfolio management, licensing and 2 other areas of law. Hongsun received a B.S. degree from Indiana University in 1999, and has been licensed for 24 years. Hongsun practices in Washington, DC.
The kind of cases Hongsun takes
Hongsun reviews new inquiries case-by-case for ip, patent, and trademark matters in Washington and the surrounding District of Columbia area.
Credentials
Credentials — where Hongsun studied and practices
Indiana University School of Law - Bloomington
J.D. · 2002
Indiana University
B.S. Biochemistry · 1999
Jurisdictions
Hongsun's state bar admissions
District of Columbia
2003 · ACTIVE
Indiana
2002 · ACTIVE
Hongsun studied at J.D. in Indiana University School of Law - Bloomington and B.S. Biochemistry in Indiana University.
Law school and academic background
Hongsun completed J.D. in Indiana University School of Law - Bloomington and B.S. Biochemistry in Indiana University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Hongsun runs in District of Columbia is where that training gets applied to real client questions.
Affiliations
Hongsun's professional memberships and bar associations
Indianapolis, Indiana State and American (Member, Intellectual Property Law Section) Bar Associations District of Columbia Bar American Intellectual Property Law Association
membership
Locations
Hongsun Yoon's office in Washington
Hongsun's primary office is at 1000 Maine Ave SW Ste 950, Washington, DC, 20024-3497. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Hongsun Yoon
Hongsun has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.
No reviews yet
Only verified clients who have consulted with Hongsun Yoon can leave a review.
Schedule your consultationHiring guide
How to hire Hongsun Yoon — what to expect in your first consultation
Working with a new ip attorney should feel structured. Here's how the first two conversations with Hongsun usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Hongsun charges for the initial consult. That fee is credited toward representation if you retain Hongsun'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; Hongsun will tell you what matters and what doesn't.
Questions to ask a ip attorney in Washington, District of Columbia
A short list to run through before you commit: How many ip 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 Hongsun
Hongsun discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in ip practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every ip 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. Hongsun confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Hongsun's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many ip practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Hongsun Yoon
How much does it cost to hire Hongsun for a ip case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Hongsun walks through the likely range during the consult so there are no surprises.
Does Hongsun offer a free consultation?
Hongsun charges for the initial consult; that fee is credited toward representation if you retain Hongsun's office. Some ip attorneys offer free consults — check Hongsun's current terms during booking.
How long do ip cases in District of Columbia typically take?
Simple ip 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. Hongsun gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Hongsun take my case if I'm outside Washington?
Hongsun is licensed in District of Columbia. Matters governed by District of Columbia law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Hongsun 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 Hongsun?
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. Hongsun will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Hongsun accepting new ip clients right now?
Hongsun's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
IP attorneys serving Washington and Belize City in District of Columbia
Hongsun handles ip matters throughout District of Columbia. Each city below is a direct link into the search page for verified ip attorneys in that community.
More counsel
Other top-rated ip attorneys in District of Columbia
If Hongsun's intake is full or the fit isn't right, these ip attorneys in Washington handle similar matters. Every profile below is verified and open to consultations.

Cameron Hajaran Tousi
Washington, District of Columbia
5.0· 21

Fernand Albert Lavallee
Washington, District of Columbia
5.0· 11

John Robert Hutchins
Washington, District of Columbia
5.0· 6

Steven Paul Hollman
Washington, District of Columbia
5.0· 6

Sheila A. Millar
Washington, District of Columbia
5.0· 5

Daniel Brendan Hassett
Washington, District of Columbia
5.0· 4