Count the actuators and the cost story changes. Boston Dynamics' October 22, 2024 grant US12122044B2 claims a non-planar linear actuator — a compact electric actuation design, exactly the kind of part the move from hydraulic to electric robots demands.

Read the transition in the claim. The CPC tags are mechanical — B25J 17/00 robot joints, B25J 9/102 actuation, F16H 25/20 and F16H 37/12 lead-screw and gear mechanisms. Hydraulic robots like the original Atlas were powerful but messy and hard to commercialize; electric actuation is the path to a sellable product, and it requires new hardware from the joint up.

“A drive system includes a linear actuator with a drive shaft and having an actuation axis extending along a length of the linear actuator. A motor assembly of the drive system couples to drive shaft and is configured to rotate the drive shaft about the actuation axis of the linear actuator.”— U.S. Patent No. 12,122,044 source

The capex read is that an architecture change of this depth is a reengineering program, not a tweak. Every joint that was hydraulic must become electric, with new actuators, new control, new thermal management. That is sustained mechanical R&D, and patents like this are its capitalized residue.

For a public-equities reader, the electric-Atlas story is a hardware-investment story. Under Hyundai's ownership, Boston Dynamics is spending to make a commercializable electric humanoid, and the actuator IP is where that spend becomes visible on the public record.

The honest limit: an actuator patent does not disclose the program cost, unit economics, or timeline to a sellable robot. It establishes that the electric transition involves core hardware reengineering — the relevant capex signal.

The takeaway for the money desk: the hydraulic-to-electric shift is a capital event, not a press release. Read actuator patents as the cost of making a research robot into a product.