re: machine patent was Re: O/T Patent applications

Richard,

If you want to do a cnc machine with a stationary timing belt, DO IT!
I can think of at least three mfr's which are "using" the "new idea"
of his patent. This is one of the problems with patents. Evidence
of "prior usage" can invalidate them, or at least make them VERY hard
to protect. Also the question of whether the idea is "obvious" to a
person well aquainted with the field of the patent; which this idea
most certainly is...

A good patent attorney understands this, and will create 'claims'
(the actual written statements supporting the new idea) which are all-
encompassing, and legally defensible. (using legalese to HELP the
inventor) Claims writing is the "art" of good patents.

AFAIK, using an idea for personal, non-commercial use is generally ok.

Hope this helps.

Ballendo

>When I started getting into CNC, I asked him if he had any tips or
>advice.
>His one line reply was "yes. My machines are protected by US Patent.
>found that his patent was for using a stationary timing belt, motor
>on gantry, for the X axis of a XY machine used for plotting sails on
>dacron.
>Hardly applied to a CNC router, though I did briefly consider making
>my X using his patented idea, just for spite.