Today’s invention is a toilet seat which is hinged at the front of the toilet. This would be (strongly) sprung open by default (ie standing vertically at the front of the bowl).
To use it either simply back onto it and sit down -or to use it standing up, move around to one side.
This has the twin advantages that people with difficulty sitting down smoothly can locate themselves safely. Also, no handling of the seat is required.
(No sign of this anywhere in various patent databases, but that may be because of my limited choice of search terms)