The market size is the story. On August 31, 2021, Northrop Grumman was granted US11104459B2, “Systems for capturing a client vehicle,” classified in B64G 1/646, the on-orbit capture art. The claim covers the hardware that lets one spacecraft physically grab another.
On-orbit servicing only generates revenue from satellites a servicer can reach and hold. Most existing satellites were never designed to be captured — no docking ring, no compatible interface. A capture system that works on standard, unprepared client features therefore directly enlarges the reachable fleet, and the reachable fleet is the servicing market.
For the orbital business desk, this reframes a capture patent as a TAM document. Each additional class of satellite the mechanism can grab — by interface, by size, by orbit — adds names to the list of potential paying clients. Conversely, a capture system that only works on purpose-built clients limits the business to satellites that have not launched yet.
The disciplined caveat: capturing an uncooperative, tumbling, or aging satellite is genuinely hard, and a granted patent proves the approach, not the success rate. A servicing TAM built on capture capability is only as real as the capture is reliable.
But that is exactly why the capture patent is the load-bearing IP in a servicing thesis. Docking rings and propellant matter, but the question that sizes the business is simpler: how many satellites can you actually grab? Northrop's capture claims are an answer to that question — and therefore to the size of the market.