David M. Spirit

Person

Suffolk, GB

People

Patents Grantslast 30 patents

Information Patent Grant
Optical switch
- Patent number 6,215,570
- Issue date Apr 10, 2001
- British Telecommunications public limited company
- Andrew David Ellis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switch
- Patent number 6,091,524
- Issue date Jul 18, 2000
- British Telecommunications public limited company
- Andrew David Ellis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switching device
- Patent number 5,742,415
- Issue date Apr 21, 1998
- British Telecommunications public limited company
- Robert J. Manning
- G02 - OPTICS
Information Patent Grant
Optical time domain reflectometry
- Patent number 5,504,617
- Issue date Apr 2, 1996
- British Telecommunications public limited company
- David M. Spirit
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical time domain relectometry with optical amplifier for extende...
- Patent number 5,448,059
- Issue date Sep 5, 1995
- British Telecommunications public limited company
- Lutz C. Blank
- G01 - MEASURING TESTING
Information Patent Grant
OTDR having optically switched amplified output onto test fibre to...
- Patent number 5,343,286
- Issue date Aug 30, 1994
- British Telecommunications public limited company
- Peter J. Keeble
- G01 - MEASURING TESTING
Information Patent Grant
OTDR using distributed optical amplification in optical waveguide u...
- Patent number 5,298,965
- Issue date Mar 29, 1994
- British Telecommunications public limited company
- David M. Spirit
- G01 - MEASURING TESTING

David M. Spirit

Person

Patents Grantslast 30 patents

Optical switch

Optical switch

Optical switching device

Optical time domain reflectometry

Optical time domain relectometry with optical amplifier for extende...

OTDR having optically switched amplified output onto test fibre to...

OTDR using distributed optical amplification in optical waveguide u...