Trademark attorney

David C Hannum

David C Hannum of Abbott Laboratories (United States) is listed as the attorney or agent of record on 37 trademark filings, as reported by the trademark offices.

Browse filings Get this data via the API

Data current as of May 1, 2026

Filings of record: 37
Still active: 0
Registration rate: 35%
Latest filingFirst in 1937: 1997

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

USPTO37100%

By classA mark can cover several classes

Class 5Pharmaceuticals2054%
Class 10Medical Apparatus822%
Class 16Paper Goods and Printed Matter411%
Class 35Advertising and Business38%
Class 1Chemicals25%
Class 9Computers and Scientific Devices25%
Class 42Computer and Scientific Services13%

Activity

Filings per year

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

Peak year · 24 filed: 1997
1993 to 1997 · filed: 33
First filing: 1937

Clients

Companies on these filings

Owners on the latest 37 filings of record that Signa links to a company record.

2 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
ABBOTT GEM	abandoned	USPTO	Abbott Laboratories	10	1997-12-04
EQUIPP	cancelled	USPTO	Abbott Laboratories	35	1997-11-17
CAPSURE POS	cancelled	USPTO	TAP Holdings, Inc.	9	1997-08-12
PROPOFLO	abandoned	USPTO	Abbott Laboratories	5	1997-07-23
CAPTHROL	abandoned	USPTO	Abbott Laboratories	5	1997-06-27
R-UK	abandoned	USPTO	Abbott Laboratories	5	1997-06-26
ALUER	cancelled	USPTO	Hospira, Inc.	5	1997-06-23
PLUM	cancelled	USPTO	Hospira, Inc.	10	1997-05-12

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

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GET /v1/attorneys/{id}

ID=att_019d14bb-b798-7532-86a9-a596662d69b4
curl https://api.signa.so/v1/attorneys/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"

Response

{
  "id": "att_019d14bb-b798-7532-86a9-a596662d69b4",
  "object": "attorney",
  "name": "DAVID C HANNUM",
  "firm_name": "Abbott Laboratories",
  "country_code": "US",
  "trademark_count": 37
}