 What didn't Feetch discover?
"Feetch!" grated Ogden Piltdon, president of the Piltdon Opener Company, slamming the drafting board with his hairy fist, "I want results!" "But Mr. Piltdon," remonstrated Feetch unsteadily under his employer's glare, "don't you remember? Four months, Feetch! Otherwise, Feetch—" Feetch's body twitched. What had happened, to the proud dream he once had, the dream of exploring uncharted engineering regions, of unlimited time to investigate and develop? "Got to be," answered Feetch tiredly. "Well, well," said Feetch. Piltdon is a household word, but who has heard of Feetch? "Hello," said Feetch as an aproned machinist entered carrying a glistening mechanism.
 The fastest-opening can opener
 Where the cans were going  The fastest-opening can opener  Multiple different universes  How to make the cans disappear safely