The dog days of summer are dwindling away here in Ohio, but there are plenty of interesting, dog-related patents on our Interesting Patents page to keep animal lovers amused over the coming autumn months. In 1920 H.L. Stoker was issued a patent for his Dog Muzzle which only becomes restrictive if the dog wearing it becomes aggressive. Although not an issued patent, a patent application published for an invention titled Dog Nose Art, which discloses an interesting way for your dog to express himself artistically. More recently a patent issued for an ingenious Drool Stopper Dog Bowl that should be popular with owners of dogs who are messy drinkers.