AO 120

Report on Filing Patent/Trademark

Agency
U.S. Courts
Revision
Rev. 08/10
Fillable fields
59
Pages
1
Official source
U.S. Courts form page
Checked
October 20, 2026
Fill AO 120 online
Page 1 of form AO 120

AO 120: Report on Filing Patent/Trademark

AO 120, Report on Filing Patent/Trademark, is a U.S. Courts form a United States District Court uses to tell the Director of the U.S. Patent and Trademark Office about a court action regarding a patent or trademark. The form itself is headed Report on the Filing or Determination of an Action Regarding a Patent or Trademark, and it cites 35 U.S.C. § 290 and/or 15 U.S.C. § 1116. The U.S. Courts page lists it under Other Forms, effective on August 1, 2010, and the PDF is dated Rev. 08/10.

The report names the court, docket number, filing date and parties, lists up to five patents or trademarks in the case, records any included later by amendment, answer, cross bill or other pleading, and records the decision or judgment. Its only signature lines are for the clerk or a deputy clerk, and its copies are mailed to the Director at different stages of the case.

This page explains the form in plain words and is not legal advice. You can fill it out free in your browser on this page and download the result without an account.

Top of page 1 of AO 120: Report on Filing Patent/Trademark, as printed by COURTS

What's on AO 120

Address block

The report is addressed to Mail Stop 8, Director of the U.S. Patent and Trademark Office, P.O. Box 1450, Alexandria, VA 22313-1450.

Notice of the court action

The form cites 35 U.S.C. § 290 and/or 15 U.S.C. § 1116 and has boxes for Trademarks or Patents, plus a box if the patent action involves 35 U.S.C. § 292. It then asks for the docket number, date filed, district court, plaintiff and defendant.

Patents or trademarks in the action

Five numbered rows for the patent or trademark number, the date of the patent or trademark, and the holder of the patent or trademark.

Patents or trademarks included later

The date included and whether they came in by amendment, answer, cross bill or other pleading, with five more rows for the added patents or trademarks.

Decision or judgment

A space for the decision rendered or judgment issued in the case, which the form labels Decision/Judgement.

Signatures and copies

Lines for the clerk, a deputy clerk and the date, then the copy instructions: Copies 1 to 3 are mailed to the Director at set stages, and Copy 4 is the case file copy.

How AO 120 is filled out

  1. 1

    Fill in the case details

    Check Trademarks or Patents, check the 35 U.S.C. § 292 box if it applies, and enter the district court, docket number, date filed, plaintiff and defendant.

  2. 2

    List each patent or trademark

    Enter the number, date and holder for each patent or trademark in the case, up to the five rows printed.

  3. 3

    Mail Copy 1 when the action starts

    The form says: upon initiation of action, mail this copy to Director.

  4. 4

    Report patents or trademarks added later

    Enter the date included, check amendment, answer, cross bill or other pleading, and list the added items. The form says to mail Copy 2 to the Director upon filing the document adding them.

  5. 5

    Record the decision and mail Copy 3

    Describe the decision or judgment, then the clerk or a deputy clerk signs and dates. The form says to mail Copy 3 to the Director upon termination of action.

  6. 6

    Keep Copy 4

    The form marks Copy 4 as the case file copy.

The form's copy instructions follow the case from start to finish.

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Where it goes, fees and timing

Where it goes

Mail Stop 8, Director of the U.S. Patent and Trademark Office, P.O. Box 1450, Alexandria, VA 22313-1450, as printed at the top of the form.

When copies are mailed

Copy 1 upon initiation of action, Copy 2 upon filing a document adding patents or trademarks, and Copy 3 upon termination of action. Copy 4 stays as the case file copy.

Fees

The form does not print a fee.

Laws named

The form cites 35 U.S.C. § 290 and/or 15 U.S.C. § 1116, and has a box for a patent action that involves 35 U.S.C. § 292. It does not quote those laws.

Format

The U.S. Courts page offers AO 120 as a PDF, effective on August 1, 2010.

Related forms

Who uses AO 120?

  • The clerk of the district court

    The form closes with lines for the clerk, a deputy clerk signing for the clerk, and the date. It has no line for a party to sign.

  • The Director of the U.S. Patent and Trademark Office

    The report is addressed to the Director at Mail Stop 8, P.O. Box 1450, Alexandria, VA 22313-1450, who receives Copies 1, 2 and 3.

  • The parties to the case

    The plaintiff and defendant are named in the case details. The form also records whether patents or trademarks were added by an amendment, answer, cross bill or other pleading.

  • Holders of patents or trademarks

    Each row of the two tables lists a patent or trademark number, the date of the patent or trademark, and the holder of the patent or trademark.

  • The court's case file

    The copy instructions at the bottom of the form mark Copy 4 as the case file copy.

The form's only signature lines are for the court's clerk or a deputy clerk, and its copies go to the Patent and Trademark Office. It names these people and offices.

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Questions about Form AO 120

Who fills out AO 120?

The form's only signature lines are for the clerk of the district court or a deputy clerk, with the date. It is addressed to the Director of the U.S. Patent and Trademark Office.

Where is AO 120 sent?

The form prints the address: Mail Stop 8, Director of the U.S. Patent and Trademark Office, P.O. Box 1450, Alexandria, VA 22313-1450.

Why does AO 120 have four copies?

Each copy matches a stage of the case. The form says to mail Copy 1 to the Director upon initiation of action, Copy 2 upon filing a document adding patents or trademarks, and Copy 3 upon termination of action. Copy 4 is the case file copy.

How many patents or trademarks fit on the form?

Each of the two tables has five numbered rows: one table for those in the action when it is filed and one for those included later.

Does AO 120 cover copyrights?

No. AO 120 covers trademarks or patents. A separate U.S. Courts form, AO 121, reports an action or appeal regarding a copyright to the Register of Copyrights.

Is there a fee for AO 120?

The form does not print a fee.

Is this page legal advice?

No. This page explains the form in plain words and is not legal advice.