21ST CENTURY RADIO holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 9 (Electronics & Software) with 1 filings. The WikiTrademarks Expansion Score is 0/100, low — the brand is focused on defending its existing categories rather than expanding.
USPTO data refreshed November 7, 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 |
|---|---|---|---|---|---|
| 86154236 | 21ST CENTURY RADIO | Dec 30, 2013 | Abandoned | 009 Electronics & Software 041 Education & Entertainment | Hieronimus & Co., Inc. |
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FAQ: 21ST CENTURY RADIO trademark portfolio
What trademarks does 21ST CENTURY RADIO hold?
21ST CENTURY RADIO holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 9 (Electronics & Software), Class 41 (Education & Entertainment). The most recent filings are registered to Hieronimus & Co., Inc..
How many trademarks does 21ST CENTURY RADIO have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to 21ST CENTURY RADIO. The brand has been actively filing since December 2013. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does 21ST CENTURY RADIO file most often?
21ST CENTURY RADIO's most active class is NICE Class 9 (Electronics & Software), with 1 filings. The full distribution across all 0 classes is shown in the Nice Class Distribution panel on this page.
Who owns the 21ST CENTURY RADIO trademark?
The most recent filings under the 21ST CENTURY RADIO mark are registered to Hieronimus & Co., Inc.. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is 21ST CENTURY RADIO expanding into new categories?
The current WikiTrademarks Expansion Score for 21ST CENTURY RADIO is 0 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 21ST CENTURY RADIO trademark filings?
Click the Watch Brand button at the top of this page to add 21ST CENTURY RADIO 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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