This is pure genius. Lieben, a company based in Japan, has created an umbrella that will keep your dog nice and dry when you walk him on a rainy day. The concept is surprisingly simple. It looks like a regular umbrella, but the canopy is inverted so that when you point it downwards it's actually right-side up. The umbrella is transparent as well so as to not impede the dog's vision.
I've never been a fan of clothes or accessories for dogs, but speaking as a proud dog-owner I think this one looks pretty Gizmagnificent. The umbrella includes a short leash on the tip that can attach to your dog's harness, giving him a little room to move about. Appropriately the umbrella's canopy is a little elongated so that it can cover your dog from head to foot rather than a standard circular umbrella.
This is certainly a product that addresses a need because dogs have to get out to do their business even on rainy days. If your dog gets just a little wet while outdoors, he's likely to bring that unpleasant wet-dog smell back into the house with him.
Now that we have the Pet Umbrella, the only thing we're lacking is dog galoshes.
The Pet Umbrella is currently available for purchase via Lieben's website (Japanese language only) for JPY1980, or about US$22.
Disclosure: I sometimes contribute to Inventorspot