Tesseract Systems LLC v. Five9, Inc. - 1:26-cv-00609

Tesseract Systems LLC v. Five9, Inc. (Case No. 1:26-cv-00609), filed on May 27, 2026 in the District Court, D. Delaware involving patent infringement. This case involves patent infringement claims between the parties. Explore details about the litigants, key filings, and major docket updates.

Case Details

Case Number
1:26-cv-00609
Filing Date
May 27, 2026
Cause of Action
Patent Infringement
Status
-
Court
District Court, D. Delaware
Nature of Suit
Patent

Parties Involved

The following parties are involved in this case, with their respective legal representatives for the case.

NameRepresented By
Five9, Inc. -
Tesseract Systems LLC -

Patents Involved

There is a single patent involved in this case.

Application NumberPatent Number
-US10984320B2

Docket Entries

The Docket Entries section provides a chronological list of all significant filings and court actions in this case.

DateDocket EntryType

Set alerts for critical docket entry

May 27, 2026Summons Issued as to Five9, Inc. on 5/27/2026. (oam) (Entered: 05/27/2026)PACER Document
May 27, 2026Disclosure Statement pursuant to Rule 7.1: No Parents or Affiliates Listed filed by Tesseract Systems LLC. (oam) (Entered: 05/27/2026)PACER Document
May 27, 2026Report to the Commissioner of Patents and Trademarks for Patent/Trademark Number(s) 10,984,320. (oam) (Entered: 05/27/2026)PACER Document
May 27, 2026Notice, Consent and Referral forms re: U.S. Magistrate Judge jurisdiction. (oam) (Entered: 05/27/2026)PACER Document
May 27, 2026MOTION for Pro Hac Vice Appearance of Attorney Isaac Philip Rabicoff - filed by Tesseract Systems LLC. (Lutness, Brian) (Entered: 05/27/2026)PACER Document
May 27, 2026COMPLAINT for Patent Infringement with Jury Demand against Five9, Inc. (Filing fee $ 405, receipt number ADEDC-4978346) - filed by Tesseract Systems LLC. (Attachments: # 1 Exhibit 1, # 2 Exhibit 2, # 3 Civil Cover Sheet)(oam) (Entered: 05/27/2026)PACER Document
May 27, 2026Pro Hac Vice Fee - Credit Card Payment received for Isaac Philip Rabicoff. ( Payment of $ 50, receipt number ADEDC-4978509).(Lutness, Brian) (Entered: 05/27/2026)PACER Document
May 27, 2026COMPLAINT for Patent Infringement with Jury Demand against Five9, Inc. (Filing fee $ 405, receipt number ADEDC-4978346) - filed by Tesseract Systems LLC. (Attachments: # 1 Exhibit 1, # 2 Exhibit 2, # 3 Civil Cover Sheet)(oam) (Entered: 05/27/2026)Attachment
May 27, 2026COMPLAINT for Patent Infringement with Jury Demand against Five9, Inc. (Filing fee $ 405, receipt number ADEDC-4978346) - filed by Tesseract Systems LLC. (Attachments: # 1 Exhibit 1, # 2 Exhibit 2, # 3 Civil Cover Sheet)(oam) (Entered: 05/27/2026)Attachment
May 27, 2026COMPLAINT for Patent Infringement with Jury Demand against Five9, Inc. (Filing fee $ 405, receipt number ADEDC-4978346) - filed by Tesseract Systems LLC. (Attachments: # 1 Exhibit 1, # 2 Exhibit 2, # 3 Civil Cover Sheet)(oam) (Entered: 05/27/2026)Attachment