GTE Business Communication Systems Inc.

Organization

Northlake, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Belt holster for telephone instrument
- Patent number D284807
- Issue date Jul 29, 1986
- GTE Business Communication Systems
- Franklin D. Knight
- D02 - Apparel and haberdashery
Information Patent Grant
Protection circuitry for subscriber's telephone circuit equipped wi...
- Patent number 4,591,666
- Issue date May 27, 1986
- GTE Business Communication Systems Inc.
- Eduard F. B. Boeckmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone instrument
- Patent number D282927
- Issue date Mar 11, 1986
- GTE Business Communication Systems Inc.
- William R. Story
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Secretarial answering system
- Patent number 4,574,165
- Issue date Mar 4, 1986
- GTE Business Communication Systems Inc.
- Louis W. Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Secretarial telephone station for use with a secretarial answering...
- Patent number 4,567,324
- Issue date Jan 28, 1986
- GTE Business Communication Systems, Inc.
- Louis W. Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Transient resistant key operated pulse generating calling device ci...
- Patent number 4,555,597
- Issue date Nov 26, 1985
- GTE Business Communication Systems Inc.
- Eduard F. B. Boeckmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Modular telephone dialer unit
- Patent number D280506
- Issue date Sep 10, 1985
- GTE Business Communication Systems Inc.
- Michael Mitchell
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Modular loudspeaking telephone unit
- Patent number D280403
- Issue date Sep 3, 1985
- GTE Business Communication Systems
- Michael Mitchell
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Modular telephone base unit
- Patent number D280405
- Issue date Sep 3, 1985
- GTE Business Communication Systems Inc.
- Michael Mitchell
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Master unlock circuit for an electronic telephone
- Patent number 4,536,620
- Issue date Aug 20, 1985
- GTE Business Communication Systems Inc.
- John G. Wagoner
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Modular telephone base unit
- Patent number D279776
- Issue date Jul 23, 1985
- GTE Business Communication Systems
- Michael Mitchell
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Subscribers telephone hold circuit with automatic disconnect
- Patent number 4,529,843
- Issue date Jul 16, 1985
- GTE Business Communication Systems Inc.
- Eduard F. B. Boeckmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Current regulated pulse dialer with memory retention circuit
- Patent number 4,527,016
- Issue date Jul 2, 1985
- GTE Business Communication Systems Inc.
- John D. Sublette
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High gain cascode amplifier with negative feedback
- Patent number 4,523,057
- Issue date Jun 11, 1985
- GTE Business Communication Systems
- Eduard F. B. Boeckmann
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual timing circuit for telephone subscriber's instrument
- Patent number 4,492,823
- Issue date Jan 8, 1985
- GTE Business Communication Systems
- Miranda L. James
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Amplifier for use with telephone transmitter mounted in hand held t...
- Patent number 4,491,689
- Issue date Jan 1, 1985
- GTE Business Communication Systems
- Eduard F. B. Boeckman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

GTE Business Communication Systems Inc.

Organization

Patents Grantslast 30 patents

Belt holster for telephone instrument

Protection circuitry for subscriber's telephone circuit equipped wi...

Telephone instrument

Secretarial answering system

Secretarial telephone station for use with a secretarial answering...

Transient resistant key operated pulse generating calling device ci...

Modular telephone dialer unit

Modular loudspeaking telephone unit

Modular telephone base unit

Master unlock circuit for an electronic telephone

Modular telephone base unit

Subscribers telephone hold circuit with automatic disconnect

Current regulated pulse dialer with memory retention circuit

High gain cascode amplifier with negative feedback

Dual timing circuit for telephone subscriber's instrument

Amplifier for use with telephone transmitter mounted in hand held t...