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

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Cleaning method for telephone number list and system...

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

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Combined keypad and protective cover

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Combined loop current sink, battery detector, and ringing detect

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

Patent

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Combined writing and signaling instrument

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Command signals generator circuit for telephonic fees indicators

Telephonic communications – Supervisory or control line signaling

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

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Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication apparatus

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication apparatus

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

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Communication apparatus for automatic dialing from a separate te

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

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Communication apparatus for responding to calls to a different a

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

Patent

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Communication apparatus having a non-ringing call receiving mode

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

Patent

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Communication apparatus having function of generating calling si

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

Patent

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Communication apparatus with facilities for changing to a pulse

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

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Communication apparatus with stored sets of destination and...

Telephonic communications – Supervisory or control line signaling – Substation originated

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication between a telephone and a computer system

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

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Reexamination Certificate

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

Communication device capable of controlling transmission paramet

Telephonic communications – Supervisory or control line signaling – Substation originated

Patent

[ 0.00 ] – not rated yet Voters 0 Comments 0

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