Another fatal mistake is not making sure that the attorney writing your patent works with the engineer. This is critical. If the patent is written first and the engineer makes changes to the design, you now have a product that doesn’t match the patent.
However, one of the most serious mistakes an inventor can make is believing everything he or she hears on television and/or internet advertising. Anyone who wants you to spend thousands of dollars up front may be making their money on you, rather than your idea, especially if you really know nothing about the service provider. Beware of TV and internet advertising that promises to make you rich on your invention! Check out the Federal Trade Commission websites on invention promotion schemes:
(http://www.ftc.gov/opa/1997/07/mouse.htm) and
(http://www.ftc.gov/bcp/conline/pubs/services/invent.htm)
or the NCIO’s (National Congress of Inventor Organization’s) “Scambusters” website:
(http://www.inventionconvention.com/ncio/scambusters/index.html).