LandOfFree - US Patents - Listing for Telephonic communications,Supervisory or control line signaling

Telephonic communications – Supervisory or control line signaling – Signal receiver

Efficient digital ITU-compliant zero-buffering DTMF...

Telephonic communications – Supervisory or control line signaling – Signal receiver

Efficient dynamic energy thresholding in multiple-tone...

Telephonic communications – Supervisory or control line signaling – Substation originated

Electric source circuit for telephone sets

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic apparatus and multi-functional telephone apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic device for providing information related to an input

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic device, input device, and portable electronic...

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic notepad

Telephonic communications – Supervisory or control line signaling – Signal reception at substation

Electronic ring monitoring device for telecommunications line

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Electronic switch for digital telephone

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic telephone device

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic telephone directory dialer module

Telephonic communications – Supervisory or control line signaling – Substation originated

Electronic telephone set

Telephonic communications – Supervisory or control line signaling – Substation originated

Enhanced addressing for fax recipients

Telephonic communications – Supervisory or control line signaling – Substation originated

Enhanced user functionality from a telephone device to an IP...

Telephonic communications – Supervisory or control line signaling – Signal receiver

Erasure of DTMF signal transmitted as speech data

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection

Event detection circuit

Telephonic communications – Supervisory or control line signaling – Substation originated

Expandable and contractible keyboard with adjustable key sizes