Petitioner contends that modifying the accelerometer in the combined Sakamoto–Gotoh system to perform Levi’s dead reckoning steps uses a known technique in a similar device to obtain a predictable result, namely, “determining position via acceleration measurements when GPS is unavailable.” Id. at 49–50 (citing Ex. 1003 ¶ 202).
In light of these teachings, we are persuaded that an ordinarily skilled artisan would have known to associate an attenuated signal below a predetermined threshold value (as discussed in claim 1) with antenna shading due to being in a partially or substantially enclosed structure.
For the “primary location tracking circuitry consumes at least reduced power,” Petitioner cites Gronemeyer’s teaching of shutting down certain components during sleep mode, including oscillator 204, radio 202, clocks generator 216, and GPS signal processors 208.
We are persuaded that an ordinarily skilled artisan would have expected success in making this modification based on Mr. Andrews’s uncontested testimony and because Gronemeyer itself states that the low power time keeping circuit components were “commercially available and relatively inexpensive.” Ex. 1077, 12:62–64; Ex. 1080 ¶¶ 37–39.
Specifically, Petitioner establishes that Gronemeyer teaches a sleep mode where “low power time keeping circuit 200 ‘remains on’ even when ‘[s]elected components residing on the GPS receiver unit’ are ‘shut down (deactivated) to conserve power.’” MTA Opp.