Trademark attorney

Yifei Zou

Di Li Law, P.C.United States

Yifei Zou of Di Li Law, P.C. (United States) is listed as the attorney or agent of record on 561 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
561
Still active
399
Registration rate
71%
Latest filingFirst in 2010
2025
Coverage

Where these filings were made

Each mark counts once here: an international registration is grouped with its country designations, not counted once per country.

By office

By classA mark can cover several classes

+34 more

Activity

Filings per year

New filings of record each year, counting each mark once.

Peak year · 221 filed
2023
2021 to 2025 · filed
502
First filing
2010

Filings by year: 2010: 2, 2011: 1, 2012: 1, 2014: 2, 2016: 8, 2017: 12, 2018: 9, 2019: 4, 2020: 20, 2021: 29, 2022: 69, 2023: 221, 2024: 120, 2025: 63.

Clients

Companies on these filings

Owners on the latest 48 filings of record that Signa links to a company record.

29 more owners in these filings are not linked to a company record.

Filings

Latest filings of record

The most recent applications naming this attorney or agent.

Browse all filings
MarkStatusOfficeOwnerClassesFiled
CASALLYallowedUSPTOOmbre LA Inc9, 422025-11-06
[Design Mark]allowedUSPTOTuan Tuan30, 432025-10-23
MAXMODERNabandonedUSPTOMaxmodern Ltd202025-10-22
MAXMODERNabandonedUSPTOMaxmodern Ltd352025-10-22
CERADISEregisteredUSPTOShenzhen Shanzhu Zhixin Technology Co., Ltd212025-10-15
CERALLEYregisteredUSPTOShenzhen Shanzhu Zhixin Technology Co., Ltd212025-10-15
HRIDAYAabandonedUSPTOHridaya TCM Corporation52025-10-13
NINJA AIRabandonedUSPTOXiao Xiao112025-09-26
API

Get this data via the API

Every number on this page comes from the Signa API. Pull the same records into your own product with one request.

  • GET/v1/attorneys/{id}

    Attorney record, firm and filing stats

  • GET/v1/attorneys/{id}/analytics

    Filings by office, class and year

  • GET/v1/attorneys/{id}/trademarks

    Every trademark the attorney is of record on

Get API keyView docs
GET /v1/attorneys/{id}
ID=att_019d28e3-8692-77be-b92e-04ef651802ea
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d28e3-8692-77be-b92e-04ef651802ea",
  "object": "attorney",
  "name": "Yifei Zou",
  "firm_name": "Di Li Law, P.C.",
  "country_code": "US",
  "trademark_count": 561
}