Trademark attorney

Zhengyan Chang

United States

Zhengyan Chang (United States) is listed as the attorney or agent of record on 2,931 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
2,931
Still active
1,822
Registration rate
89%
Latest filingFirst in 2015
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

+26 more

Activity

Filings per year

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

Peak year · 2,038 filed
2021
2021 to 2025 · filed
2,105
First filing
2015

Filings by year: 2015: 1, 2018: 8, 2019: 176, 2020: 641, 2021: 2038, 2022: 4, 2023: 58, 2024: 1, 2025: 4.

Clients

Companies on these filings

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

37 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
MOYÉ HOMEabandonedUSPTOXing-Ying Liang242025-08-12
GOLDFISHregisteredUSPTOLumatas Biosystems, Inc.1, 52025-03-03
VOLAexaminingUSPTOVOLA Networks Corporation92025-01-23
VOLACLOUDabandonedUSPTOVOLA Networks Corporation352025-01-23
DIAGLOGICregisteredUSPTOLumatas Biosystems, Inc.1, 52024-06-04
MEDRESQregisteredUSPTOAnping Guardian Medical Equipment Co.,Ltd52023-06-16
JESTARLYregisteredUSPTOLiang Xianfu142023-06-16
REIKILOVEabandonedUSPTOGuangzhou Suyue Cross-border E-commerce Co., LTD212023-04-02
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_019d292c-c641-70ec-beed-6b95f7e86bf3
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d292c-c641-70ec-beed-6b95f7e86bf3",
  "object": "attorney",
  "name": "Zhengyan Chang",
  "firm_name": null,
  "country_code": "US",
  "trademark_count": 2931
}