A foldable hand truck apparatus having 1) a main support frame assembly; 2) a support wheel assembly connected to the main support frame assembly which resembles a conventional hand truck structure; 3) an extendable handle assembly having a handle support tube which is anchored to the main support frame...http://www.google.es/patents/US5549317?utm_source=gb-gplus-sharePatente US5549317 - Foldable hand truck apparatus
