These startups both released groundbreaking induction stoves. Now they’re embroiled in a lawsuit

The kitchen appliance market is currently witnessing a high-stakes collision between two startups attempting to solve the same electrical bottleneck: the inability of legacy home wiring to support high-performance induction cooking without costly panel upgrades. This isn’t just a fight over stoves; it’s a battle for the intellectual property (IP) governing decentralized energy storage at the appliance level.

The Tech TL;DR:

• The Conflict: Copper has sued Impulse Labs in Delaware federal court for patent infringement regarding integrated battery designs in induction stoves.
• The Tech: Internal batteries act as buffers to ease installation in homes lacking electrical upgrades and provide grid-scale energy storage during peak demand.
• The Stakes: Copper holds patents dating back to 2022; Impulse’s four patent attempts in 2024 and 2025 were rejected by the USPTO citing Copper’s existing IP.

The Infrastructure Bottleneck: Why Batteries in Stoves?

For most senior engineers and CTOs, the problem is obvious: the power draw of a high-end induction range often exceeds the capacity of standard residential circuits. Upgrading a home’s electrical service is a friction-heavy process involving permits, expensive labor, and significant downtime. By integrating a battery directly into the chassis, these companies are essentially deploying a local capacitor to shave peak loads.

This architectural choice allows the appliance to draw a steady, lower current from the grid to keep the battery topped off, then discharge high bursts of energy when the induction coils are pushed to maximum output. From a grid perspective, this transforms a passive appliance into an active node for energy storage, potentially mitigating stress on the electric grid during peak usage windows. Though, deploying this at scale requires a rigorous approach to thermal management and SOC 2-style reliability to ensure that a battery tucked under a hot stove doesn’t become a liability.

Because these installations often bypass the need for traditional electrical overhauls, homeowners are increasingly relying on certified electrical contractors to ensure that the existing circuitry can safely handle the continuous trickle-charge required by these integrated systems.

Hardware Specification & IP Timeline

The legal dispute hinges on who first solved the “appliance level battery-based energy storage” problem. Copper’s lineage traces back to 2019 via the R&D lab Otherlab, supported by a U.S. Department of Energy grant in 2020. This provided the foundational research necessary to secure their first patent in March 2022.

The “Trojan Horse” Deployment Strategy

Impulse Labs, led by former Facebook engineer Sam D’Amico, has been candid about its approach. D’Amico previously described the strategy as “Trojan-horsing a small battery into people’s homes” via the appliance. Even as this is an effective GTM (Go-To-Market) strategy to scale energy storage without the friction of selling a standalone wall-battery like the Tesla Powerwall, it creates a precarious legal position when a competitor already holds the patent for that exact integration.

The USPTO’s repeated rejection of Impulse’s patent filings in 2024 and 2025 suggests that the “prior art” established by Copper is robust. For Impulse, the defense now rests on whether Copper’s patents are overly broad or if Impulse’s specific implementation differs enough in its power management logic to avoid infringement.

As this litigation progresses, the industry is seeing a surge in demand for intellectual property attorneys specializing in hardware patents to help other startups navigate the minefield of “smart” appliance IP.

Implementation: Monitoring Battery State via API

For developers integrating these appliances into a wider Home Energy Management System (HEMS), the ability to poll the battery’s state of charge (SOC) and discharge rate is critical for peak shaving. While specific API docs for these startups are proprietary, a standard REST implementation for such a device would likely follow this pattern to monitor energy telemetry:

# Requesting real-time telemetry from the stove's integrated battery controller curl -X Gain "https://api.smartstove.io/v1/device/telemetry"  -H "Authorization: Bearer YOUR_ACCESS_TOKEN"  -H "Content-Type: application/json"  -d '{ "metrics": ["battery_soc", "current_draw_watts", "thermal_state"], "interval": "1s" }'

Grid-Scale Implications and the Licensing Play

Copper CEO Sam Calisch is playing a longer game. Rather than attempting to dominate the consumer hardware market alone, Copper is pushing for a licensing model. By partnering with large appliance manufacturers, Copper aims to standardize battery-integrated designs across the industry. This would essentially move the “energy storage” layer of the home from a luxury add-on to a standard feature of the kitchen stack.

The technical upside is significant. If a meaningful percentage of households adopt battery-integrated appliances, the aggregate storage capacity could allow utilities to shift loads more effectively, absorbing excess renewable energy during the day and discharging it during evening peaks. This turns the kitchen into a distributed power plant, provided the communication protocols between the appliance and the utility are secure and low-latency.

Impulse Labs maintains that this lawsuit is a tactical move by a competitor losing market share. However, in the world of hardware, shipping a product is only half the battle; owning the IP is what prevents a competitor from simply licensing your design to a giant like Samsung or LG and erasing your market presence overnight.