KRRO-121 holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 5 (Pharmaceuticals) with 1 filings. The WikiTrademarks Expansion Score is 31/100, low — the brand is focused on defending its existing categories rather than expanding.
USPTO data refreshed July 30, 2026
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Filing Velocity (24 Months)
Nice Class Distribution
Activity Timeline
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Recent Filings
| Serial No. | Mark | Filing Date | Status | Classes | Owner |
|---|---|---|---|---|---|
| 99637921 | KRRO-121 | Feb 06, 2026 | Registered | 005 Pharmaceuticals 042 Science & Technology | Korro Bio, Inc. |
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FAQ: KRRO-121 trademark portfolio
What trademarks does KRRO-121 hold?
KRRO-121 holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 5 (Pharmaceuticals), Class 42 (Science & Technology). The most recent filings are registered to Korro Bio, Inc..
How many trademarks does KRRO-121 have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to KRRO-121. The brand has been actively filing since February 2026. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does KRRO-121 file most often?
KRRO-121's most active class is NICE Class 5 (Pharmaceuticals), with 1 filings. The full distribution across all 0 classes is shown in the Nice Class Distribution panel on this page.
Who owns the KRRO-121 trademark?
The most recent filings under the KRRO-121 mark are registered to Korro Bio, Inc.. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is KRRO-121 expanding into new categories?
The current WikiTrademarks Expansion Score for KRRO-121 is 31 out of 100, which is low — the brand is focused on defending its existing categories rather than expanding. The score combines NICE class breadth, filing velocity, and the rate of cross-class movement from the brand's filing history.
How can I track new KRRO-121 trademark filings?
Click the Watch Brand button at the top of this page to add KRRO-121 to your Watchlist. New filings show up on your WikiTrademarks dashboard within 24 to 48 hours of being public, alongside any class expansions, status changes, or assignment events.
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