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UNITED STATES DISTRICT COURT

FOR THE EASTERN DISTRICT OF TEXAS

MARSHALL DIVISION

HEADWATER RESEARCH LLC,

Plaintiff,

 v.

T-MOBILE USA, INC., T-MOBILE US, 

INC., and SPRINT CORP.,

Defendants.

Civil Action No. 2:23-cv-00379-JRG-RSP

(Lead Case)

JURY DEMANDED

HEADWATER RESEARCH LLC,

Plaintiff,

 v.

T-MOBILE USA, INC., T-MOBILE US, 

INC., and SPRINT CORP.,

Defendants.

Civil Action No. 2:23-cv-00377-JRG-RSP

(Member Case)

JURY DEMANDED

ORDER REGARDING E-DISCOVERY

The Court ORDERS as follows:

1. This order supplements all other discovery rules and orders. It streamlines Electronically 

Stored Information (“ESI”) production to promote a “just, speedy, and inexpensive 

determination” of this action, as required by Federal Rule of Civil Procedure 1.

2. This order may be modified in the court’s discretion or by agreement of the parties. 

3. A party’s meaningful compliance with this order and efforts to promote efficiency and 

reduce costs will be considered in cost-shifting determinations.

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4. Absent agreement of the parties otherwise, any production of ESI shall include metadata, 

to the extent such metadata is applicable to an individual item and is already within the 

producing Party’s possession, custody, or control, showing an individual item’s:

A. Title;

B. Filename;

C. Creation date and time;

D. Modification date and time;

E. Author;

F. Subject line;

G. Distribution list (e.g., “To,” “Cc,” and “Bcc” fields);

H. Date and time sent;

I. Date and time received.

5. Absent agreement of the parties or further order of this court, the following parameters shall 

apply to ESI production:

A. General Document Image Format. Each electronic document shall be 

produced in single-page Tagged Image File Format (“TIFF”) format. Each 

electronic document shall be named with a unique production number 

followed by the appropriate file extension. If a document contains

attachments (e.g., an attachment to an email), such attachments shall be 

separately produced as electronic documents. Load files shall be provided 

to indicate the location of produced electronic documents, identify any 

attachments to electronic documents through unitization information, and 

identify any metadata of produced electronic documents.

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B. Text-Searchable Documents. If a party’s documents exist in any textsearchable format independent of this litigation, or are converted to textsearchable format for use in this litigation, including for use by the 

producing party’s counsel, then such documents shall be produced in the 

same text-searchable format at no cost to the receiving party.

C. Footer. Each page of any document produced in electronic image format 

shall contain a footer with a sequentially ascending production number.

D. Native Files. Documents that would not be reasonably legible in image or 

near-native format, and documents that would be incomplete in image or 

near-native format, should be produced as native files. Examples of such 

documents include, without limitation, spreadsheets of more than a single 

page and documents, including for example PowerPoint files, containing 

tracked changes, comments, or notes that would not be visible in an image 

format. A party that receives a document produced in an image format may 

make a reasonable request to receive the document in its native format, 

and upon receipt of such a request, the producing party shall produce the 

document in its native format.

E. No Backup Restoration Required. Absent a showing of good cause, no 

party need restore any form of media upon which backup data is 

maintained in a party’s normal or allowed processes, including but not 

limited to backup tapes, disks, SAN, and other forms of media, to comply 

with its discovery obligations in the present case.

F. Voicemail and Mobile Devices. Absent a showing of good cause, 

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voicemails and mobile device/PDA data and messages (e.g., SMS, chat 

histories) need not be collected and produced.

6. General ESI production requests under Federal Rules of Civil Procedure 34 and 45, or 

compliance with a mandatory disclosure order of this court, shall not include e-mail or other 

forms of electronic correspondence (collectively “e-mail”). To obtain e-mail, parties must 

propound specific e-mail production requests.

7. E-mail production requests shall be phased to occur timely after the parties have exchanged 

initial disclosures, a specific listing of likely e-mail custodians, a specific identification1 of 

the fifteen (15) most significant listed e-mail custodians in view of the pleaded claims and 

defenses, infringement contentions and accompanying documents pursuant to P.R. 3-1 and 

3-2, invalidity contentions and accompanying documents pursuant to P.R. 3-3 and 3-4, and 

preliminary information relevant to damages. The exchange of this information shall occur 

at the time required under the Federal Rules of Civil Procedure, Local Rules, or by order of 

the court. Each requesting party may also propound up to five written discovery requests 

and take one deposition per producing party to identify the proper custodians, proper search 

terms, and proper time frame for e-mail production requests. The court may allow additional 

discovery upon a showing of good cause.

8. E-mail production requests shall identify the custodian, search terms, and time frame. The 

parties shall cooperate to identify the proper custodians, proper search terms, and proper 

time frame. Each requesting party shall limit its e-mail production requests to a total of 

eight (8) custodians per producing party for all such requests. The parties may jointly agree 

to modify this limit without the court’s leave. The court shall consider contested requests 

1 A “specific identification” requires a short description of why the custodian is believed to be 

significant.

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for additional or fewer custodians per producing party, upon showing a distinct need based 

on the size, complexity, and issues of this specific case.

9. Each requesting party shall limit its e-mail production requests to a total of ten (10) search 

terms per custodian per party. The parties may jointly agree to modify this limit without the 

court’s leave. The court shall consider contested requests for additional or fewer search 

terms per custodian, upon showing a distinct need based on the size, complexity, and issues 

of this specific case. The search terms shall be narrowly tailored to particular issues. 

Indiscriminate terms, such as the producing company’s name or its product name, are 

inappropriate unless combined with narrowing search criteria that sufficiently reduce the 

risk of overproduction. A conjunctive combination of multiple words or phrases (e.g., 

“computer” and “system”) narrows the search and shall count as a single search term. A 

disjunctive combination of multiple words or phrases (e.g., “computer” or “system”) 

broadens the search, and thus each word or phrase shall count as a separate search term 

unless they are variants of the same word. Use of narrowing search criteria (e.g., “and,” 

“but not,” “w/x”) is encouraged to limit the production and shall be considered when 

determining whether to shift costs for disproportionate discovery.

10. For any email custodians located in the European Union or the United Kingdom, the Parties 

will confer about an appropriate agreed upon method to filter the email search results to 

exclude and/or redact hits that contain sensitive information, to comply with obligations 

under the GDPR and/or the UK’s Data Protection Act of 2018. Nothing in this Order shall 

require any party to violate the terms of the GDPR and/or the UK’s Data Protection Act of 

2018 or any other privacy law or regulation that may be applicable to a given custodian.

11. Pursuant to Federal Rule of Evidence 502(d), the inadvertent production of a privileged or 

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work product protected ESI is not a waiver in the pending case or in any other federal or 

state proceeding.

12. The mere production of ESI in a litigation as part of a mass production shall not itself 

constitute a waiver for any purpose.

13. Except as expressly stated, nothing in this order affects the parties’ discovery obligations 

under the Federal or Local Rules.

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