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

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus

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

Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus for automatic dialing from a separate te

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

Communication apparatus for responding to calls to a different a

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

Communication apparatus having a non-ringing call receiving mode

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

Communication apparatus having function of generating calling si

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus with facilities for changing to a pulse

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication apparatus with stored sets of destination and...

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

Communication between a telephone and a computer system

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication device capable of controlling transmission paramet

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

Communication set with detection of set function and line...

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication system

Telephonic communications – Supervisory or control line signaling – Substation originated

Communication system

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

Communication system