<!--
  ┌────────────────────────────────────────────────────────────────────────┐
  │  FICTIONAL TEACHING DOCUMENT — "Claude for Legal: A Guided Tour"          │
  │  Every party, name, patent number, date, and claim below is invented      │
  │  for practice. NOT legal advice, not a model demand letter. It is         │
  │  deliberately written with triage-relevant features (deadline,            │
  │  preservation demand, settlement framing, thin claim mapping) so a        │
  │  litigation-triage tool has something to find. Free to reuse.             │
  └────────────────────────────────────────────────────────────────────────┘
-->

# SORTWELL ROBOTICS, INC.
**Office of the General Counsel · 880 Caldera Parkway, Reno, NV**

June 2, 2026

**VIA EMAIL AND CERTIFIED MAIL**

General Counsel
Sablefield Robotics, Inc.
1201 Foundry Street
Nashville, TN

**Re: Infringement of U.S. Patent No. 11,842,605 — Demand to Cease and Desist**

Dear Counsel:

We write on behalf of Sortwell Robotics, Inc. (“Sortwell”), the owner by assignment of **U.S. Patent
No. 11,842,605** (“the ’605 Patent”), entitled *“Adaptive Grip-Force Modulation for Robotic End
Effectors.”* The ’605 Patent issued on November 19, 2024, and remains in full force.

It has come to Sortwell's attention that Sablefield Robotics, Inc. (“Sablefield”) manufactures,
offers for sale, and sells industrial robots incorporating an end-effector module marketed as
**“GripSense,”** including on Sablefield's SF-300 and SF-340 platforms. Based on Sablefield's
published product documentation and marketing materials, Sortwell believes the GripSense module
practices one or more claims of the ’605 Patent, **including at least independent claim 1**.

Sortwell therefore demands that Sablefield:

1. **Immediately cease and desist** from the manufacture, use, offer for sale, sale, and importation
   of the GripSense module and any substantially similar adaptive grip-force technology;
2. Provide a **written accounting** of all units of the SF-300 and SF-340 incorporating GripSense
   sold to date, including dates, quantities, and revenue;
3. Confirm in writing, **within twenty-one (21) days of the date of this letter**, that Sablefield
   has complied with the demands above.

**Preservation notice.** Litigation is reasonably foreseeable. Sablefield is hereby on notice of its
obligation to preserve all documents, communications, source code, design files, test data, and
electronically stored information relating to the design, development, marketing, and sale of
GripSense and the SF-300/SF-340 platforms, including materials in the possession of employees,
contractors, and agents.

Absent timely compliance, Sortwell is prepared to enforce its rights through an action for patent
infringement in the United States District Court for the District of Delaware, where it will seek
injunctive relief, damages (including enhanced damages for willful infringement), and its costs and
attorneys' fees, and to pursue **all other available remedies**.

Sortwell notes, without waiving any rights, that it has in appropriate circumstances **licensed the
’605 Patent on commercially reasonable terms**, and remains open to a business discussion should
Sablefield wish to pursue one promptly.

This letter is written without prejudice to, and with full reservation of, all of Sortwell's rights
and remedies, none of which are waived.

Very truly yours,

R. Calloway
Vice President & General Counsel
Sortwell Robotics, Inc.