Trademark attorney

Timothy David Sitzmann

Winthrop & Weinstine, P.A.United States

Timothy David Sitzmann of Winthrop & Weinstine, P.A. (United States) is listed as the attorney or agent of record on 23 trademark filings, as reported by the trademark offices.

Browse filingsGet this data via the API
Filings of record
23
Still active
20
Registration rate
80%
Latest filingFirst in 2013
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

+7 more

Activity

Filings per year

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

Peak year · 19 filed
2025
2021 to 2025 · filed
22
First filing
2013

Filings by year: 2013: 1, 2024: 3, 2025: 19.

Clients

Companies on these filings

Owners on the latest 23 filings of record that Signa links to a company record.

14 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
TRUEHELMregisteredUSPTOTTCP Management Services, LLC362025-10-29
BADERregisteredUSPTOBader Management, Inc.36, 372025-07-30
BIG FLIRTexaminingUSPTORegents of the University of Minnesota312025-07-23
BEYONDERallowedUSPTOBeyonder LLC35, 412025-05-12
ROXII SUPERCUBEregisteredUSPTOSadorp US, Inc.302025-04-14
LEGACY-TREESregisteredUSPTOLegacy-Trees, LLC312025-03-26
ZTM LEGAZTREEZabandonedUSPTOLegacy-Trees, LLC312025-03-26
MINNESOTA HOCKEY HALL OF FAMEallowedUSPTOMinnesota Hockey Hall of Fame, LLC252025-03-14
API

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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_019d2a27-ea28-7448-8e3e-ace1879a9528
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "att_019d2a27-ea28-7448-8e3e-ace1879a9528",
  "object": "attorney",
  "name": "Timothy David Sitzmann",
  "firm_name": "Winthrop & Weinstine, P.A.",
  "country_code": "US",
  "trademark_count": 23
}