On Sun, 5 Mar 2000, Steven T. Ekstrand wrote:
> I thought Patents were good for only 17 Years. This was early 80's? It's
> up or about to be.
I believe its 20 years. I'm not sure if they can be renewed beyond that.
There are actually a few renewals that you have to keep up with before then,
but whoever owns this one obviously has been keeping it up to date, as its
still in the "active" list. I don't recall the exact date of the patent,
(I think 1984?) but you're right, its probably going to be up sometime
around 2004.
-Jon-
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| Jon Steiger * AOPA, DoD, EAA, MP Race Team, NMA, SPA, USUA * RP-SEL |
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