But a thief among them has been selling the technology to unscrupulous elements outside, who intend to patent them; hence hinder their widespread adoption.
So a detective is hired to catch the thief...
Notes.I'm not convinced of the ending. I've never seen a microfilm, but can you attach one to a wing of a butterfly & have the poor thing still fly?
Fact sheet.First published: Horizons du Fantastique (French), sometime in 1974. This post is based on an English translation by Stanley Hochman included in Wollheim's anthology.