The most revealing word in a control claim is usually the one describing what it's defending against. Here it's "fault-tolerant." Tata's grant US10751881B2 ("System and method for executing fault-tolerant simultaneous localization and mapping in robotic clusters," issued August 25, 2020; inventors Swarnava Dey, Swagata Biswas, Arijit Mukherjee) claims SLAM — building a map and tracking pose within it — distributed across a group of robots, with the explicit property that the joint map survives when one robot drops out. The claim is fenced around the failure, not the mapping.
The mechanism is distributed SLAM with redundancy. Multiple robots contribute observations to a shared localization-and-mapping computation; the system is structured so that the loss of any single contributor degrades gracefully rather than collapsing the map. The G05D 1/0295 code — cooperative control of multiple vehicles — is the tell that this is a fleet/cluster claim, and the B25J cooperating-manipulator codes show the robots themselves are treated as program-controlled units.
For the control beat, fault-tolerance limitations are a gift to the reader because they expose the inventor's threat model. A claim that bakes in "keep mapping when a node fails" is admitting that node failure is the expected, not exceptional, condition in a multi-robot deployment. That is honest engineering, and it's the kind of limitation that makes a claim both narrower (it requires the redundancy mechanism) and more defensible (the mechanism is the inventive step).
From a portfolio view, this is an early multi-robot-coordination SLAM asset from a services-and-research giant rather than a robotics product company. TCS files broadly across computing; a cluster-SLAM patent reads as research-portfolio IP — the sort that becomes valuable if warehouse and logistics fleets standardize on cooperative mapping, and that can be licensed rather than asserted in a product fight.
Caveats. "Fault-tolerant" and "cluster" are strong claim-scope words, which usually means the independent claim is correspondingly specific about how the tolerance is achieved — a narrow grant, not a broad one. And distributed SLAM has a substantial academic prior-art base; the inventive delta is the redundancy method, so read claim 1 for the exact failover mechanism.
For the file: a narrow, well-targeted multi-robot SLAM grant whose value is its fault-tolerance limitation. Pull US10751881B2 on PatentBear and read claim 1 for how node failure is detected and absorbed — that step is the asset.