SMART STONE holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 28 (Games & Toys) 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 October 5, 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 |
|---|---|---|---|---|---|
| 90550302 | SMART STONE | Feb 26, 2021 | Pending | 028 Games & Toys | Liang Yingchu |
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FAQ: SMART STONE trademark portfolio
What trademarks does SMART STONE hold?
SMART STONE holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 28 (Games & Toys). The most recent filings are registered to Liang Yingchu.
How many trademarks does SMART STONE have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to SMART STONE. The brand has been actively filing since February 2021. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does SMART STONE file most often?
SMART STONE's most active class is NICE Class 28 (Games & Toys), with 1 filings. The full distribution across all 0 classes is shown in the Nice Class Distribution panel on this page.
Who owns the SMART STONE trademark?
The most recent filings under the SMART STONE mark are registered to Liang Yingchu. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is SMART STONE expanding into new categories?
The current WikiTrademarks Expansion Score for SMART STONE 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 SMART STONE trademark filings?
Click the Watch Brand button at the top of this page to add SMART STONE 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 SMART STONE to another owner · Browse all NICE classes · Most valuable brands
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