Ramon C. W. Chea Jr.

Person

Monroe, CT, US

People

Patents Grantslast 30 patents

Information Patent Grant
Wide-band high voltage amplifier for telephone exchange subscriber...
- Patent number 4,674,119
- Issue date Jun 16, 1987
- ITT Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Programmable ring signal generator
- Patent number 4,656,659
- Issue date Apr 7, 1987
- ITT Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual voltage source feed circuit configuration for a telephone line...
- Patent number 4,602,130
- Issue date Jul 22, 1986
- ITT Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interface circuit for a subscriber line circuit
- Patent number 4,598,173
- Issue date Jul 1, 1986
- ITT Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone line circuit and system
- Patent number 4,456,991
- Issue date Jun 26, 1984
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Analog subscriber/trunk module with shared ringing source and ring-...
- Patent number 4,435,803
- Issue date Mar 6, 1984
- International Telephone & Telegraph Corporation
- Santanu Das
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Solid state telephone line interface circuit with ringing capability
- Patent number 4,431,868
- Issue date Feb 14, 1984
- International Telephone & Telegraph Corporation
- Daniel M. Bolus
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber line interface circuit with impedance synthesizer
- Patent number 4,387,273
- Issue date Jun 7, 1983
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Programmable ring signal generator
- Patent number 4,349,703
- Issue date Sep 14, 1982
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber line interface circuit utilizing impedance synthesizer a...
- Patent number 4,317,963
- Issue date Mar 2, 1982
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for regulating current supplied to a telephone line signa...
- Patent number 4,315,106
- Issue date Feb 9, 1982
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signal coding for compressed pulse code modulation system
- Patent number 4,150,368
- Issue date Apr 17, 1979
- International Telephone & Telegraph Corporation
- Ramon C. W. Chea
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Ramon C. W. Chea Jr.

Person

Patents Grantslast 30 patents

Wide-band high voltage amplifier for telephone exchange subscriber...

Programmable ring signal generator

Dual voltage source feed circuit configuration for a telephone line...

Interface circuit for a subscriber line circuit

Telephone line circuit and system

Analog subscriber/trunk module with shared ringing source and ring-...

Solid state telephone line interface circuit with ringing capability

Subscriber line interface circuit with impedance synthesizer

Programmable ring signal generator

Subscriber line interface circuit utilizing impedance synthesizer a...

Apparatus for regulating current supplied to a telephone line signa...

Signal coding for compressed pulse code modulation system