Space Saver

http://www.google.com/patents/about?id=jkFBAAAAEBAJ

Even in 1923, parking was a problem. Iowa’s Leander Pelton proposed this solution — a lightweight car that can be stood on end and wheeled about on casters.

“When it is in this position, it may be moved through an ordinary doorway, or a very large number of them could be stored or parked in a comparatively small road or floor area.”

Unfortunately it would also be a bonanza for car thieves.