Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, Markus Zingg <m.zingg@n...>
wrote:

>
> Bungard, but since it dates back to the sixties I figure the patent
> protection is meanwhile void. I'm however not experienced, that

said I

> don't know if a patent is protecting "forever" or if it's only
> effective for some years.
>

17 years