Help with tracking a story

[Michael Lean <m.lean@xxxxxxxxxx>]

G'day digital copyright-ers,
Does anyone remember a SF story - probably the 1960s - set in a world where
copyright inspectors walked around with listening devices strapped to their
bodies, and eavesdropped on conversations. If you were heard to use a
copyrighted word, the cash register went "ding" and the inspector put out
his hand for payment.
If anyone can recall this, I'd appreciate a source, as I want to use it in a
presentation.
many thanks,
Mike

Michael M. Lean JP (Qual)
University Copyright Officer
Griffith University and Queensland University of Technology
Brisbane, Australia
  Phone 07 3864 4024 Fax 07 3864 1823

"There is nothing - absolutely nothing - half so much worth doing  as 
simply messing about in boats."
                         Kenneth Grahame -The Wind in the Willows  1910