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Cordless phone systems US Patent 6,970,706 - PRIOR ART REQUEST

Do you remember cordless landline phones? Specifically, do you recall or know of any technology for selectively forwarding phone calls to particular cordless landline handsets, based on the phone ...
EA Kretzmer's user avatar
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Secure telephone-based payments - Patent application - Prior art request

US patent application 2220110228919 (USPTO link) seems to be trying to patent an on/off switch for DTMF audio on telephone networks. The key claims are these (effectively the first three): A ...
Charles Jakes's user avatar