ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,383,931, issued on Aug. 12.
"Plant pollen sifter device and its accessories" was invented by Ying Zhao (Hebei, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The embodiment of the application discloses Plant Pollen Sifter device, relating to the technical field of pollen sieving, comprising sieve tray, sieve tray comprises inner tray and outer tray, wherein inner tray is sleeved inside outer tray, a plurality of installation holes are opened at the top edge of inner tray, inner tray is connected with storage board through the installation holes, and one side of storage board is provided with a clamping plate rack adapted to the installation holes....