FEFN holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 11 (Lighting & HVAC) with 1 filings. The WikiTrademarks Expansion Score is 1/100, low — the brand is focused on defending its existing categories rather than expanding.
USPTO data refreshed November 11, 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 |
|---|---|---|---|---|---|
| 97739306 | FEFN | Jan 03, 2023 | Pending | 011 Lighting & HVAC | Zhu, Yunhao |
Weekly visibility reports showing how ChatGPT mentions FEFN, where you rank in the answer, the sentiment of the mention, and which sources ChatGPT cites.
FAQ: FEFN trademark portfolio
What trademarks does FEFN hold?
FEFN holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 11 (Lighting & HVAC). The most recent filings are registered to Zhu, Yunhao.
How many trademarks does FEFN have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to FEFN. The brand has been actively filing since January 2023. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does FEFN file most often?
FEFN's most active class is NICE Class 11 (Lighting & HVAC), with 1 filings. The full distribution across all 0 classes is shown in the Nice Class Distribution panel on this page.
Who owns the FEFN trademark?
The most recent filings under the FEFN mark are registered to Zhu, Yunhao. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is FEFN expanding into new categories?
The current WikiTrademarks Expansion Score for FEFN is 1 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 FEFN trademark filings?
Click the Watch Brand button at the top of this page to add FEFN 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.
More on this portfolio: Compare FEFN to another owner · Browse all NICE classes · Most valuable brands
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