Inventing for Fun and Profit

Inventing for Fun and Profit

By

A guide to the procedures involved in inventing and in patenting, promoting, and marketing inventions describes the author's experiences with four of his numerous creations Published By Outlet on 1978


Book details

  • Paperback
  • 96 pages
  • English
  • 051753312X
  • 9780517533123

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