Trademark attorney

Ellen E. Whitehorn

Bryan Cave Leighton Paisner LLPUnited States

Ellen E. Whitehorn of Bryan Cave Leighton Paisner LLP (United States) is listed as the attorney or agent of record on 42 trademark filings, as reported by the trademark offices.

Browse filings Get this data via the API

Data current as of October 28, 2026

Filings of record: 42
Still active: 41
Registration rate: 95%
Latest filingFirst in 1995: 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

USPTO42100%

By classA mark can cover several classes

Class 36Insurance and Financial2252%
Class 42Computer and Scientific Services1433%
Class 35Advertising and Business410%
Class 41Education and Entertainment410%
Class 7Machines and Machine Tools37%
Class 9Computers and Scientific Devices37%
Class 45Legal and Personal37%
Class 1Chemicals25%

+12 more

Activity

Filings per year

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

Peak year · 15 filed: 2026
2022 to 2026 · filed: 28
First filing: 1995

Clients

Companies on these filings

Owners on the latest 42 filings of record that Signa links to a company record.

13 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

Mark	Status	Office	Owner	Classes	Filed
CAMP GLEN BROOK	examining	USPTO	The Waldorf School of Garden City	41	2026-08-19
ITD	examining	USPTO	Meyer Laboratory, LLC	1, 2, 3, 5, 40, 42	2026-07-21
ITD A MEYER COMPANY	examining	USPTO	Meyer Laboratory, LLC	40, 42	2026-07-21
ITD A MEYER COMPANY	examining	USPTO	Meyer Laboratory, LLC	1, 2, 3, 5	2026-07-21
DENTAL HYGIENE CLINIC	examining	USPTO	Concorde Career Colleges, Inc.	41, 44	2026-06-25
ZELLEUSD	pending publication	USPTO	Early Warning Services, LLC	9, 36, 42	2026-06-08
KANSAS CITY COLD STORAGE	registered	USPTO	KC Cold Storage Corporation	39	2026-04-17
IDRM	examining	USPTO	Early Warning Services, LLC	36, 42	2026-04-01

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 key View docs

GET /v1/attorneys/{id}

ID=att_019d6070-9dd5-7409-b876-a7e128b5d2f3
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"

Response

{
  "id": "att_019d6070-9dd5-7409-b876-a7e128b5d2f3",
  "object": "attorney",
  "name": "Ellen E. Whitehorn",
  "firm_name": "Bryan Cave Leighton Paisner LLP",
  "country_code": "US",
  "trademark_count": 42
}