ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,458, issued on June 2.

"Door assembly for a manure holding tank" was invented by Ian Nuhn (Stratford, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A door assembly for a manure holding tank comprises a door, at least one latch subassembly for locking the door when the door is closed and a door operating mechanism. The at least one latch subassembly is mountable on the manure holding tank. The door operating mechanism is mountable on the holding tank and connected to the door for opening and closing the door. The door operating mechanism comprises a pivotably moveable portion to open and close the door and a linearly translatable portion that ...