New York attorney record · Judicial Dept 1
Jason Yoonho Ko
Marquette University alumna, admitted to the New York bar in 2009, registered office in Alexandria, VA. This established record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2009
- Admitted
- 17
- Years in bar
- 4731469
- NY reg #
The record in one line
Jason Yoonho Ko has held an active New York bar license for 17 years - admitted in 2009, longer-tenured than 37% of the state's currently-active attorneys.
- 17 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 63%
- by tenure among active NY attorneys
- Law school
- Marquette University
Data updated May 2026
What this profile tells you
Bar status & tenure
Jason Yoonho Ko carries New York bar registration 4731469, an established, active practitioner in good standing. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under United States Patent And Trademark Office, located in Alexandria, VA, ZIP 22314. 5 other attorneys share this firm affiliation in the registry. Educational background: MARQUETTE UNIVERSITY (42 registered alumni).
State context & due diligence
With an established practice on record, Jason Yoonho Ko remains inside the New York bar's active cohort - see below for how that share of the register compares.
Experience vs. the active New York bar
Jason Yoonho Ko was admitted in 2009, giving 17 years on the New York register. The histogram places that tenure against every currently-active attorney in the state, taller bars hold more attorneys at that experience level.
17 years on the New York bar
Years since admission, all currently-active NY attorneys
17 Top 63% higher than 37% of 284,296 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · May 2026
Marquette University's active-bar rate
Of Marquette University's 42 alumni in the New York register, 64.3% currently hold "Currently registered" status, below the statewide average.
Marquette University alumni, active-bar rate
The 2009 admission class today
Of the 10,203 attorneys admitted to the New York bar in 2009, 84.8% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 4731469
- Year Admitted
- 2009 (17 yrs · senior)
- Judicial Department
- 1
- Next Registration
- Aug 2027
Location & Contact
- Company
- United States Patent And Trademark Office
- City
- Alexandria, VA
- ZIP Code
- 22314
- Phone
- (571) 270-7451
Education
Status Distribution Across the New York Bar
Jason Yoonho Ko's current status, "Currently registered", places this attorney in the 66.2% of the 429,620-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Other Attorneys at United States Patent And Trademark Office
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Compare attorneys →Before you rely on this record
Jason Yoonho Ko's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is Jason Ko licensed?
Jason Ko is licensed to practice law in New York.
When was Jason Yoonho Ko admitted to the bar?
Jason Yoonho Ko was admitted to the bar in 2009.
Where did Jason Yoonho Ko go to law school?
Jason Yoonho Ko attended MARQUETTE UNIVERSITY.
What company does Jason Yoonho Ko work for?
Jason Yoonho Ko is associated with United States Patent And Trademark Office in Alexandria, VA.
Is Jason Yoonho Ko in good standing?
Yes, Jason Yoonho Ko holds active bar status ("Currently registered").
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.