-jma
At 06:53 PM 1/17/2008, R. Snyder wrote:
>Speaking of patents, here's an issued U.S. patent on
>using 150 kHz to 5 MHz RF to obtain capacitive
>coupling across the hookswitch contacts of an on-hook
>telephone set:
>http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=4,286,113.PN.&OS=PN/4,286,113&RS=PN/4,286,113
>
>There is plenty of interesting reading in class 379,
>subclass 35:
>http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.htm&r=0&p=1&f=S&l=50&Query=ccl%2F379%2F35&d=PALL
>
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Received on Sat Mar 02 2024 - 00:57:23 CST