USPTO trademark

FLATLINER

RegisteredUSPTOWord markClass 7

"FLATLINER" is a word mark owned by Keystone Engineering & MFG, LLC, filed at the USPTO on September 28, 2012. It is registered and covers class 7 (Machines and Machine Tools).

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Data current as of February 23, 2023Official USPTO record

As filed with the USPTO

Status: Registered; Since February 23, 2023
Filed: September 28, 2012
Registered: May 21, 2013
Expires: Not recorded
Application no.: 85741419
Registration no.: 4338650
Office: USPTO; United States Patent and Trademark Office
Mark type: Word mark; 1 class

Ownership

Who owns FLATLINER

The owner and representative on file with the office.

Owner

Keystone Engineering & MFG, LLC

Avon, United States

Representative

Sanders N Hillis

Crowell & Moring LLP

Goods and services

What the mark covers

The products and services FLATLINER is filed for, grouped by Nice class.

07Class 7 · Machines and Machine Tools
Grinding machines for smoothing road surfaces

History

What has happened so far

Steps recorded by the USPTO, newest first.

March 19, 2025Automatic update of assignment of ownership
February 23, 2023Notice of acceptance of sec. 8 & 9 - e-mailed
February 23, 2023Registered and renewed (first renewal - 10 yrs)
February 23, 2023Registered - sec. 8 (10-yr) accepted/sec. 9 granted
February 23, 2023Case assigned to post registration paralegal
August 4, 2022Teas section 8 & 9 received
May 21, 2022Courtesy reminder - sec. 8 (10-yr)/sec. 9 e-mailed
June 3, 2019Notice of acceptance of sec. 8 & 15 - e-mailed
June 3, 2019Registered - sec. 8 (6-yr) accepted & sec. 15 ack.
June 3, 2019Case assigned to post registration paralegal

10 earlier steps on the official record.

FAQ

About FLATLINER

Who owns the trademark "FLATLINER"?

The USPTO trademark "FLATLINER" (application 85741419) is owned by Keystone Engineering & MFG, LLC.

What is the status of "FLATLINER"?

Its status at the USPTO is: registered.

When was "FLATLINER" registered?

It was registered on May 21, 2013.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull FLATLINER and marks like it into your own product with one request.

GET/v1/trademarks/{id}
The full record: owners, classes, dates and images
GET/v1/trademarks/{id}/events
Every step in the office history
GET/v1/proceedings?trademark_id={id}
Oppositions and cancellations against the mark

Get API key View docs

GET /v1/trademarks/{id}

ID=tm_019d2d24-5b88-728f-a553-dac9ddda2252
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"

Response

{
  "id": "tm_019d2d24-5b88-728f-a553-dac9ddda2252",
  "object": "trademark",
  "mark_text": "FLATLINER",
  "status": {
    "primary": "active",
    "stage": "registered"
  },
  "office_code": "US",
  "application_number": "85741419",
  "filing_date": "2012-09-28",
  "nice_classes": [
    7
  ],
  "owners": [
    {
      "name": "KEYSTONE ENGINEERING & MFG, LLC",
      "entity_id": null
    }
  ]
}