Caterpillar Sues Back The Bobcat Amid Alleged Patent Violation

A legal ongoing battle between two industry giants, Caterpillar and Bobcat, has taken another serious turn. 

Caterpillar has now filed back the Bobcat, making it clear that no one is ready to back down anytime soon.

On May 26, 2026, Caterpillar filed a new round of case against Doosan Bobcat. The case was filed in U.S. District Court in Delaware and a new complaint at the U.S. International Trade Commission (ITC).

Resources claim that this is not just a counterpunch but a separate legal offensive against different patents. Let’s see how the situation turns from here.

How We Got Here

If you have been following this story you know the fight didn’t start with Caterpillar. Doosan Bobcat fired the first shot back in December 2025, filing lawsuits in federal and international courts accusing Caterpillar of infringing on 14 patents, ranging from hydraulic drive systems and variable engine speed controls to its Sticksteer joystick technology and E-fence geofencing software. 

Those complaints were filed in U.S. federal court in Texas, at the ITC and in European courts as well.

Caterpillar’s first response came in March 2026, when it filed a counterclaim in the Texas case accusing Bobcat of infringing on six of its own patents. The filing also named Bobcat dealer Berry Companies Inc. of Kansas as a defendant.

But apparently that wasn’t enough for Caterpillar Construction equipment. The May 26 action is a completely new front.

What Caterpillar Is Saying Now

The new Delaware lawsuit and ITC complaint allege that Doosan Bobcat is infringing four Caterpillar patents related to machine control systems, hydraulic performance, fuel efficiency and smooth-drive technology.

More specifically, Caterpillar points to its intelligent control systems, the sort of technology that prevents engines from stalling, smooths out jerky machine movements and makes engines more fuel-efficient. 

The suit claims Bobcat’s TL519, TL723 and TL923 telehandlers, E145 and E165 excavators and T86 compact track loaders incorporate these Caterpillar technologies without authorization.

One of the patents in question, a Machine Control System and Method awarded in August 2013, reportedly covers the ECO-Mode and horsepower control features found in Bobcat telehandlers, compact track loaders and skid steers. Caterpillar, for example, cites its 982 XE wheel loader and 255 compact track loader as machines with these innovations at the heart of their performance.

Cat isn’t shy about its frustration either. Doosan Bobcat allegedly ran a far-reaching competitive intelligence program, pitting its machines against Cat’s on a public website that has since been taken down, and used that knowledge in product development in ways that crossed legal lines, according to a lawsuit. 

Doosan acquired a detailed understanding of Caterpillar’s products and technologies through this extensive competitive intelligence program that Doosan now hides from public view, the lawsuit states.

Caterpillar is seeking a permanent injunction, lost profits, attorney’s fees, and a jury trial.

At the ITC, Cat is pushing for a limited exclusion order that would block imports of the disputed Bobcat equipment into the United States entirely.

What This Case Means Beyond The Courtroom

At the core of this divide is who really owns the intellectual property behind modern compact equipment technology, and that has real-world implications in the larger market.

These are not minor features; they are fighting over them. Hydraulic drive automation, intelligent engine controls, geofencing safety systems, and lift arm zone management are the types of innovations that determine how a machine performs on a job site and how competitive a product line can be. Both companies have poured a lot of money into these areas, and both are claiming to have gotten there first.

One other thing to mention is that there is a precedent factor. Bobcat’s original complaint specifically cites the Wirtgen v. Caterpillar case, in which a federal jury found that Caterpillar had to pay Wirtgen $12.9 million in damages for road-milling technology patents, plus damages from the judge. Clearly, Bobcat wants the court to see a pattern here. Caterpillar, for its part, seems equally intent on arguing that it’s been the recipient of the same treatment.

In the used equipment market, a case that leads to import bans or production limits on either side would have real impacts on machine availability and pricing for contractors, dealers, and buyers. Both Caterpillar and Bobcat dominate segments of the compact equipment market, skid steers, compact track loaders, and excavators, so any supply disruption would be felt quickly.

What Is the Current Situation?

At the moment, both companies are deeply entrenched. Bobcat continues to hold its original claims in multiple jurisdictions. 

Caterpillar now has the March counterclaim in Texas and the separate Delaware action. Cases of this size tend to drag on through the legal system, and given the patent cross-claims between federal courts, the ITC and international courts, it’s probably still a while before these disputes will be settled.

Doosan Bobcat has denied Cat’s original counterclaims but has yet to file a formal response to the amended filings. In its statement following the escalation in May 2026, the company said it stands behind its innovations and will defend its position in court.

What is certain is this isn’t a one-sided battle anymore, and the result will probably determine how the two biggest names in compact construction equipment compete for years to come.

With legal battles between major manufacturers creating uncertainty around compact equipment supply, buying quality used machinery now makes more sense than waiting. MY-Equipment stocks a wide range of used Caterpillar machines, including compact track loaders, skid steers, and excavators, available out of Houston, Texas. Browse our Caterpillar inventory or contact our team to check current availability.

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