Trademark attorney

Jon L. Farnsworth

Spencer Fane LLPUnited States

Jon L. Farnsworth of Spencer Fane LLP (United States) is listed as the attorney or agent of record on 157 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
157
Still active
112
Registration rate
82%
Latest filingFirst in 1990
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

  • Class 35Advertising and Business4831%
  • Class 36Insurance and Financial3422%
  • Class 41Education and Entertainment3019%
  • Class 42Computer and Scientific Services1610%
  • Class 9Computers and Scientific Devices149%
  • Class 44Medical, Beauty, and Agricultural138%
  • Class 3Cosmetics and Cleaning Preparations128%
  • Class 25Clothing117%

+20 more

Activity

Filings per year

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

Peak year · 28 filed
2026
2022 to 2026 · filed
49
First filing
1990

Filings by year: 1990: 1, 1998: 1, 2000: 1, 2001: 1, 2002: 2, 2004: 5, 2005: 1, 2007: 1, 2008: 4, 2010: 1, 2011: 4, 2012: 3, 2013: 4, 2014: 1, 2015: 10, 2016: 7, 2017: 15, 2018: 10, 2019: 11, 2020: 7, 2021: 18, 2022: 5, 2023: 9, 2024: 3, 2025: 4, 2026: 28.

Clients

Companies on these filings

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

17 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
PESANETexaminingUSPTOPesanet Inc.9, 362026-08-18
PRESSURE INTELLIGENCEexaminingUSPTOResonant Vector, LLC92026-05-21
PRESSURE INTELLIGENCEexaminingUSPTOResonant Vector, LLC352026-05-21
PRESSURE INTELLIGENCEexaminingUSPTOResonant Vector, LLC422026-05-21
PRESSURE SIGNATUREexaminingUSPTOResonant Vector, LLC412026-05-21
PRESSURE SIGNATUREexaminingUSPTOResonant Vector, LLC16, 35, 422026-05-21
RESONANT VECTORexaminingUSPTOResonant Vector, LLC352026-05-21
RESONANT VECTORexaminingUSPTOResonant Vector, LLC412026-05-21
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_019d17f3-4950-7618-97ea-f7d90b93ab48
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d17f3-4950-7618-97ea-f7d90b93ab48",
  "object": "attorney",
  "name": "Jon L. Farnsworth",
  "firm_name": "Spencer Fane LLP",
  "country_code": "US",
  "trademark_count": 157
}