Cat’s Big Fight With a Tiny Rival Over Driverless Machines

A five-year-old Pittsburgh start-up with 14 employees has become the target of the world’s largest construction equipment maker, in a patent fight that doubles as a test of how much protection a company can claim over the software running inside machines it has already sold.

Caterpillar filed the suit on June 10 in a Delaware federal court against Bluelight Machines, accusing it of infringing five patents covering autonomous operation and compaction technology. The filing seeks a permanent injunction against Bluelight’s products, triple damages, legal costs and a jury trial.

At issue are aftermarket kits that convert vibratory soil compactors and articulated dump trucks to driverless operation, priced between $50,000 and $60,000 and fitted in under two hours. 

Roughly 200 kits are currently running on active subscriptions, according to Bluelight chief executive Dick Zhang, with the company now reporting 1.4 billion square feet of autonomous compaction completed.

Caterpillar’s complaint zeroes in on Bluelight’s origins. 

“Bluelight’s development of these kits was so intertwined with Caterpillar technology that they initially only worked on Caterpillar machines,” the lawsuit says. 

The manufacturer argues it is effectively subsidising its own displacement, noting it is “now competing for the same customers against the very technologies it invented and patented.” 

Five components are named as infringing, spanning GPS antennas and cabling, an auto-pilot C-set, a steering motor, and the tablet software running the system.

Zhang does not dispute where Bluelight began, but tells a different story of how it got there. The company’s first conversion came after a customer handed over an old Caterpillar roller and asked him to make it drive itself. 

READ MORE: How Caterpillar Bulldozed Its Way Into The Tech World

Having previously run a drone-surveying business for a decade, Zhang says he simply combined two off-the-shelf ideas: “We took literally free, open-source drone technologies that have been around for almost 20 years. We combined that with a steering wheel motor thing … that are used on farm tractors. Farm tractors have been doing the drive-by-itself thing since the early 2000s.”

He is blunt about the merits of the case: “We think it’s a no-merits set of allegations.” Bluelight, he says, holds no patents of its own, partly because software moves too fast to protect that way, and points out that Caterpillar showed little interest in the company for its first eighteen months, before sales accelerated and, in his words, the “hostility” began.

Whatever the legal outcome, Zhang says the market reaction so far has run in his favour. “Not a single customer has changed their course of business with us,” he says, adding that business has picked up since the suit was filed. 

He casts the mismatch in scale, roughly 14 employees against Caterpillar’s 130,000, as a David-and-Goliath contest that has only sharpened customer loyalty, and one he suspects doubles as validation of what his kits can do.

For an industry watching equipment makers race to build autonomy in-house, the case will test a sharper question: whether retrofitting rivals can legally piggyback on open-source tools once a machine has left the factory floor, or whether that innovation still belongs, in part, to the manufacturer that built the machine in the first place.

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