The Plessey Company plc

Organization

Ilford, GB

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Patents Grantslast 30 patents

Information Patent Grant
Amplifier arrangement with time constant control
- Patent number 5,130,668
- Issue date Jul 14, 1992
- Orbitel Mobile Communications Limited
- Robert J. Emslie
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical devices utilizing photochromic compounds
- Patent number 4,990,287
- Issue date Feb 5, 1991
- The Plessey Company plc
- Ian Bennion
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Telecommunications digital switch
- Patent number 4,912,700
- Issue date Mar 27, 1990
- The Plessey Company plc
- Thomas S. Maddern
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wideband/multislot switching arrangement
- Patent number 4,905,223
- Issue date Feb 27, 1990
- The Plessey Company plc
- Richard J. Proctor
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light emitting diode array
- Patent number 4,888,603
- Issue date Dec 19, 1989
- The Plessey Company plc
- Peter B. Hart
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Synchronization arrangements for a digital telecommunications excha...
- Patent number 4,864,556
- Issue date Sep 5, 1989
- The Plessey Company P.L.C.
- Geoffrey Chopping
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photochromic gamma butyrolactones
- Patent number 4,861,899
- Issue date Aug 29, 1989
- The Plessey Company plc
- Clive Trundle
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Security arrangement for a telecommunications exchange system
- Patent number 4,858,223
- Issue date Aug 15, 1989
- The Plessey Company plc
- John W. Ansell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Organic optical waveguides and method of fabricating waveguide stru...
- Patent number 4,838,634
- Issue date Jun 13, 1989
- The Plessey Company plc
- Ian Bennion
- G02 - OPTICS
Information Patent Grant
Photochromic spiropyran compounds
- Patent number 4,826,977
- Issue date May 2, 1989
- The Plessey Company plc
- Harry G. Heller
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photoreactive lenses with adamantane spiro compounds
- Patent number 4,818,096
- Issue date Apr 4, 1989
- The Plessey Company plc
- Harry G. Heller
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Method of secured communications in a telecommunications system
- Patent number 4,794,644
- Issue date Dec 27, 1988
- The Plessey Company, plc
- Alexander S. Philip
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photochromic 3-pyrryl fulgides and fulgimides
- Patent number 4,737,449
- Issue date Apr 12, 1988
- The Plessey Company P.L.C.
- Harry G. Heller
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychr...
- Patent number 4,685,783
- Issue date Aug 11, 1987
- The Plessey Company P.L.C.
- Harold H. Heller
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Arrangement for controlling switched speech or data communication i...
- Patent number 4,648,090
- Issue date Mar 3, 1987
- The Plessey Company plc
- Thomas S. Maddern
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frame aligner for use in telecommunications systems
- Patent number 4,617,659
- Issue date Oct 14, 1986
- The Plessey Company plc
- Geoffrey Chopping
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of growth of a digital switchblock
- Patent number 4,587,649
- Issue date May 6, 1986
- The Plessey Company plc
- Thomas S. Maddern
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photochromic compounds and their use in photoreactive lenses
- Patent number 4,576,766
- Issue date Mar 18, 1986
- The Plessey Company plc
- Martin W. Baskerville
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Coin runway with coin sequencing facility
- Patent number 4,573,485
- Issue date Mar 4, 1986
- The Plessey Company plc
- Charles L. Nye
- G07 - CHECKING-DEVICES
Information Patent Grant
Digital switching network for telecommunications exchange
- Patent number 4,535,442
- Issue date Aug 13, 1985
- The Plessey Company plc
- Thomas S. Maddern
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telecommunications digital switchblock utilizing control switch sta...
- Patent number 4,530,089
- Issue date Jul 16, 1985
- The Plessey Company plc
- John W. Ansell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time division multiplex telecommunication digital switching modules
- Patent number 4,425,641
- Issue date Jan 10, 1984
- The Plessey Company plc
- Joseph A. French
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telecommunications switching network using digital switching modules
- Patent number 4,425,640
- Issue date Jan 10, 1984
- The Plessey Company plc
- Alexander S. Philip
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital telecommunications switches network with in-built fault ide...
- Patent number 4,393,490
- Issue date Jul 12, 1983
- The Plessey Company plc
- Ernest Culley
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Alarm monitoring arrangements for digital telecommunications switch...
- Patent number 4,387,456
- Issue date Jun 7, 1983
- The Plessey Company plc
- Peter V. Creteau
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Frame aligner for digital telecommunications exchange system
- Patent number 4,368,531
- Issue date Jan 11, 1983
- The Plessey Company Limited
- Geoffrey Chopping
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Channel zero switching arrangements for digital telecommunication e...
- Patent number 4,365,330
- Issue date Dec 21, 1982
- The Plessey Company plc
- Geoffrey Chopping
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital switching arrangements for stored program control telecommu...
- Patent number 4,300,230
- Issue date Nov 10, 1981
- The Plessey Company Limited
- Alexander S. Philip
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Longitudinal balance arrangements for two-to-four wire telecommunic...
- Patent number 4,289,939
- Issue date Sep 15, 1981
- The Plessey Company Limited
- John S. Arnold
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Analogue-to-digital converter
- Patent number 4,203,092
- Issue date May 13, 1980
- The Plessey Company Limited
- Christopher C. A. Priest
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

Information Trademark
72033370 - PLESSEY
- Serial number 72033370
- Registration number 661602
- Filing date Jul 8, 1957
- THE PLESSEY COMPANY LIMITED
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments

The Plessey Company plc

Organization

Patents Grantslast 30 patents

Amplifier arrangement with time constant control

Optical devices utilizing photochromic compounds

Telecommunications digital switch

Wideband/multislot switching arrangement

Light emitting diode array

Synchronization arrangements for a digital telecommunications excha...

Photochromic gamma butyrolactones

Security arrangement for a telecommunications exchange system

Organic optical waveguides and method of fabricating waveguide stru...

Photochromic spiropyran compounds

Photoreactive lenses with adamantane spiro compounds

Method of secured communications in a telecommunications system

Photochromic 3-pyrryl fulgides and fulgimides

Polychromic tetracyclo-spiro-adamatylidene derivatives, and polychr...

Arrangement for controlling switched speech or data communication i...

Frame aligner for use in telecommunications systems

Method of growth of a digital switchblock

Photochromic compounds and their use in photoreactive lenses

Coin runway with coin sequencing facility

Digital switching network for telecommunications exchange

Telecommunications digital switchblock utilizing control switch sta...

Time division multiplex telecommunication digital switching modules

Telecommunications switching network using digital switching modules

Digital telecommunications switches network with in-built fault ide...

Alarm monitoring arrangements for digital telecommunications switch...

Frame aligner for digital telecommunications exchange system

Channel zero switching arrangements for digital telecommunication e...

Digital switching arrangements for stored program control telecommu...

Longitudinal balance arrangements for two-to-four wire telecommunic...

Analogue-to-digital converter

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

72033370 - PLESSEY