On 10/10/2012 11:01 AM, Tom Fine wrote:
> Hi Patrick:
>
> This is awesome and all-encompassing, but has anyone filtered out the
> "key" patents and made a list? These lists seem more about completism
> than showing the progress of patented developments toward the current
> state of the art. Just off the top of my head, I'd like to know the key
> developments, not dead ends for:
>
> --Edison
> --Bell/Taintor
> --Berliner
> --Bell Labs/Western Electric
> --RCA
> --Blumlein
Hi Tom:
The spreadsheet I posted has many of those:
www.stlecd.org/hold/Audio_Patents.xls
Peace,
Paul
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