Trademark attorney

Ziwen Zhu

Troutman Pepper Locke LLPUnited States

Ziwen Zhu of Troutman Pepper Locke LLP (United States) is listed as the attorney or agent of record on 154 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
154
Still active
70
Registration rate
68%
Latest filingFirst in 1956
2026
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

+27 more

Activity

Filings per year

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

Peak year · 21 filed
2021
2022 to 2026 · filed
40
First filing
1952

Filings by year: 1952: 1, 1956: 1, 1990: 1, 2004: 1, 2005: 1, 2006: 1, 2007: 2, 2008: 5, 2009: 6, 2010: 5, 2011: 5, 2012: 3, 2013: 2, 2014: 14, 2015: 9, 2016: 6, 2017: 5, 2018: 6, 2019: 8, 2020: 11, 2021: 21, 2022: 16, 2023: 2, 2024: 9, 2025: 9, 2026: 4.

Clients

Companies on these filings

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

12 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
MODFLEXXexaminingUSPTONisco Co., Ltd.202026-04-30
RIPPLEFLEXXexaminingUSPTONisco Co., Ltd.202026-04-30
RIPPLEFLEXXexaminingUSPTONisco Co., Ltd.202026-04-30
OPTIQpending oppositionUSPTOPusen USA Inc.102026-02-26
ENVIRO PAKabandonedUSPTOPusen USA Inc.162025-09-10
FEATHER TOUCHregisteredUSPTOPusen USA Inc.102025-09-10
AUTO-STAYallowedUSPTOPusen USA Inc.102025-09-10
FANSexaminingUSPTOPusen USA Inc.102025-09-10
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_019d14ed-7a07-7179-adb7-8d623cda0edc
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d14ed-7a07-7179-adb7-8d623cda0edc",
  "object": "attorney",
  "name": "Ziwen Zhu",
  "firm_name": "Troutman Pepper Locke LLP",
  "country_code": "US",
  "trademark_count": 154
}