Moog Ladder Filter

[Joachim Verghese]

Paul Schreiber wrote:

> Also, you can order his original LP filter patent for like $2
> from the US patent office.
> 
> You *used to* be able to view it free at www.patents.ibm.com
> but IBM got greedy and took off all the pre-1971 stuff.

It's also available in PDF form at my website at

http://www.netcontrol.fi/~jocke/arptech/patent.htm

(until someone gets greedy and wants it off my site... :-)

-joachim