ALEXANDRIA, Va., June 10 -- United States Patent no. 12,292,430, issued on May 6.
"Soil testing device" was invented by Jian Yu (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A soil testing device includes a housing and at least one sensor assembly rotatably connected to the housing. The at least one sensor assembly is configured to insert into soil and to output an electrical signal corresponding to a soil parameter to be displayed on a display unit. The at least one sensor assembly includes a rotating portion and a detecting rod, the rotating portion is connected with the detecting rod, and the rotating portion is disposed in the housing, the detecting rod extends out of the housing from a...