Trademark attorney

Mark A. Jansen

Fenwick & West LLPUnited States

Mark A. Jansen of Fenwick & West LLP (United States) is listed as the attorney or agent of record on 1,041 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
1,041
Still active
594
Registration rate
74%
Latest filingFirst in 1950
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

+32 more

Activity

Filings per year

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

Peak year · 123 filed
2022
2021 to 2025 · filed
351
First filing
1950

Filings by year: 1950: 1, 1973: 1, 1986: 2, 1988: 1, 1991: 2, 1992: 1, 1994: 5, 1995: 1, 1996: 7, 1997: 6, 1998: 6, 1999: 20, 2000: 21, 2001: 5, 2002: 4, 2003: 3, 2004: 4, 2005: 5, 2006: 10, 2007: 16, 2008: 29, 2009: 23, 2010: 40, 2011: 34, 2012: 31, 2013: 47, 2014: 63, 2015: 46, 2016: 35, 2017: 40, 2018: 49, 2019: 56, 2020: 76, 2021: 99, 2022: 123, 2023: 88, 2024: 34, 2025: 7.

Clients

Companies on these filings

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

27 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
THRIVE AI HEALTHabandonedUSPTOThrive AI Health, Inc.9, 412025-07-30
LOKOregisteredUSPTOLoko AI, Inc.422025-06-11
TRANSFORMING CURRENT INTO CURRENCYabandonedUSPTOShadow Power, Inc.4, 37, 39, 402025-03-26
MOST: MARKETING OPERATING SYSTEM OF TOMORROWabandonedUSPTOOutrow Inc.9, 35, 422025-03-15
LAWPRO.AIregisteredUSPTOLawPro.ai Inc.422025-03-10
LOKO AIabandonedUSPTOLoko AI, Inc.422025-01-27
DERMCEUTICAL BARRIER REPAIRPROabandonedUSPTODebut Biotechnology, Inc.1, 3, 52025-01-15
CLOUD VAULTabandonedUSPTORebuy, Inc.9, 422024-12-16
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_019d14d8-4592-7218-9ab2-fa0ad779a739
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d14d8-4592-7218-9ab2-fa0ad779a739",
  "object": "attorney",
  "name": "Mark A. Jansen",
  "firm_name": "Fenwick & West LLP",
  "country_code": "US",
  "trademark_count": 1041
}