ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,360, issued on Dec. 16.
"Soil detector" was invented by Liping Gao (Yuyao, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses a soil detector, comprising a housing, a circuit board, and a probe; the circuit board is provided within the housing, and the probe extends into the housing and is electrically connected to the circuit board; a detection electrode is provided on the probe; a soil detection circuit is provided on the circuit board; when soil pH detection is performed, the probe is inserted into soil, and the soil detection circuit reads a time-varying amount of an electromotive force formed by the detection...