Homebrew PCBs

Phil wrote:
> --- 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
> 

we had patent discussion long time ago on this group.
see message
http://groups.yahoo.com/group/Homebrew_PCBs/message/1561

Does the yahoo groups "search archive" feature search the entire hystory 
of the messages ? I coulnd't find this message using the yahoo search. 
All the messages are stored, but it seems they cannot all be searched. I 
had to search for this message from the email folder on my home PC.