I just found a link to The Delphion Gallery of Obscure Patents over at The Straight Dope. If you enjoyed the Unuseless Japanese Inventions books, this site is for you. The site is a study in American capitalism. Whereas Japanese practitioners of Chindohgu, the art of the "unuseless idea," develop ridiculous inventions for the sake of artistry, we western barbarians actually take our shit to the USPTO.
Hyper-light-speed antenna (In your face, Raymond Chiao!)
Pneumatic shoe lacing apparatus (As seen in Back to the Future Part II.)
And, unquestionably the best of the bunch, Bird trap and cat feeder