U.S. Patent No. 4,233,942 (.pdf)
With drawings a little too silly not to laugh at, this invention sets the bar for utilitarian creativity. Cleaning dog food out of your puppy's ears is always a hassle, so having a self-contained support system for keeping those droopy ears out of the food bowl saves a lot of time and frustration. The only difficulty raised, though, is making sure that your dog is wearing them every time they go to eat or drink. Or that they don't go crazy trying to get the plastic tubes off their head! In the end, a solution might require using Pavlov's good old bell technique to make your dog's eating habits regular enough so that you can be there to put the tubes on and take them off. Perhaps the process of using this invention is warrant of its own patent? Oh woe to the difficult of feeding long-eared dogs!