Representative before the EPO

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Technology Company

Representative before the EPO

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2 offices
Technology Company

We have observed 46 EP applications Chi-Fai Lau has served for within the last five+ years. (We consider all applications which have an EP A1 or A2 publication dated after July 14, 2013). Please note, that we only count EP applications, in which the name of the patent attorney is explicitly mentioned as representative. These EP applications are:

EP12704889

COMPACT CUMULATIVE BIT CURVES

IPC classification:
H04N 7/24
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The patent has been granted
EP12250081

Cable damage detection

IPC classification:
H04M 11/06, H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250076

Estimating line rate

IPC classification:
H04L 12/26
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12767077

LINE PERFORMANCE MEASURE

IPC classification:
H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
GRANT OF PATENT INTENDED
EP13250032

Identifying line faults using near and far end errors

IPC classification:
H04M 3/22, H04B 3/46
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13250047

Access network management

IPC classification:
H04M 11/06, H04M 3/42, H04L 12/28, H04L 12/24
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250046

Communications network

IPC classification:
H04M 11/06, H04L 5/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250049

Re-marking of packets for congestion control

IPC classification:
H04L 12/801
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13250037

Deadline driven content delivery

IPC classification:
H04L 12/801
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250155

Perceptually driven error correction for video transmission

IPC classification:
H04N 19/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12806077

ASSESSING PACKET LOSS VISIBILITY IN VIDEO

IPC classification:
H04N 17/00, G06T 7/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP12250180

Fault localisation

IPC classification:
H04M 3/30, H04M 3/08, H04B 3/46
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250183

Detection of data connection loss

IPC classification:
H04L 12/26, H04L 12/24
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250077

Content distribution system and method

IPC classification:
H04N 21/61, H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250076

Content distribution system and method

IPC classification:
H04N 21/6405, H04N 21/472, H04N 21/258
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250080

Content distribution system and method

IPC classification:
H04N 21/6405, H04N 21/472, H04N 21/258
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250078

Content distribution system and method

IPC classification:
H04L 12/18
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13250005

Validating communications

IPC classification:
H04M 7/00, H04M 3/436, H04M 3/42, H04M 3/38
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250187

Fault identification using line attenuations

IPC classification:
H04M 11/06, H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13719588

ESTIMATING LINE RATE

IPC classification:
H04L 12/26
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
PATENT GRANTED
EP13250084

Video caching

IPC classification:
H04N 21/845, H04N 21/433, H04N 21/2343, H04N 21/231
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13719591

DROPCABLE

IPC classification:
H04B 1/04, H01B 1/04, G02B 6/44
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION DEEMED TO BE WITHDRAWN
EP13250107

Triple buffer key handling

IPC classification:
H04N 21/266
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13771168

WIRELESS ACCESS POINT

IPC classification:
H04W 48/02
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
GRANT OF PATENT INTENDED
EP13773306

PERCEPTUALLY DRIVEN ERROR CORRECTION FOR VIDEO TRANSMISSION

IPC classification:
H04N 19/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION IN PROGRESS
EP13773305

APPLICATION LAYER SESSION ROUTING

IPC classification:
H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
The patent has been granted
EP13805464

FAULT LOCALISATION

IPC classification:
H04M 3/30, H04M 3/08, H04B 3/46
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
PATENT GRANTED
EP13818357

OVERLOAD CONTROL FOR SESSION SETUPS

IPC classification:
H04L 29/08, H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
GRANT OF PATENT INTENDED
EP14709733

IDENTIFYING LINE FAULTS USING REGRESSION ANALYSIS ON NEAR AND FAR END ERRORS

IPC classification:
H04M 3/22, H04B 3/46
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
PATENT GRANTED
EP14710940

DEADLINE DRIVEN CONTENT DELIVERY

IPC classification:
H04L 12/801
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
PATENT GRANTED
EP14715382

ACCESS NETWORK MANAGEMENT

IPC classification:
H04M 11/06, H04M 3/42, H04L 12/24, H04L 12/28
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
EXAMINATION REQUESTED
EP14750377

VIDEO CACHING

IPC classification:
H04N 21/845, H04N 21/433, H04N 21/2343, H04N 21/231
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
GRANT OF PATENT INTENDED
EP11804740

A METHOD FOR DELIVERING VIDEO CONTENT ENCODED AT ONE OR MORE QUALITY LEVELS OVER A DATA NETWORK

IPC classification:
H04L 12/927, H04L 12/911, H04N 19/177, H04N 19/18, H04N 19/154, H04N 19/146, H04N 21/647, H04N 21/262, H04N 21/258, H04N 21/238, H04N 21/24, H04L 12/811, H04N 21/2343, H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP11805128

VIDEO STREAMING OVER DATA NETWORKS

IPC classification:
H04N 19/44, H04N 19/192, H04N 19/177, H04N 19/154, H04N 19/152, H04N 19/115, H04N 21/462, H04N 21/2343, H04L 12/927, H04L 12/911, H04L 12/801, H04L 12/811, H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP15275088

INTELLIGENT CACHING

IPC classification:
G06F 12/12
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP14814988

SMART DYNAMIC LINE MANAGEMENT

IPC classification:
H04B 3/32, H04L 1/00, H04M 11/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The patent has been granted
EP15702835

OPTIMISED LINE SYNCHRONISATION

IPC classification:
H04B 3/32, H04L 1/00, H04M 11/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15710856

DYNAMIC LINE MANAGEMENT

IPC classification:
H04M 3/30, H04L 12/24, H04L 12/28
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15714257

MULTICAST STREAMING

IPC classification:
H04W 76/00, H04N 21/845, H04N 21/6408, H04N 21/6405, H04N 21/438, G06F 17/30, H04N 21/2343
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15714258

MULTICAST STREAMING

IPC classification:
H04W 76/00, H04N 21/845, H04N 21/6408, H04N 21/6405, H04N 21/438, G06F 17/30, H04N 21/2343
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15753934

NETWORK CONNECTIVITY IDENTIFICATION

IPC classification:
H04L 12/26
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15763607

OPTIMISED BROADBAND LINE TESTING

IPC classification:
H04M 3/30, H04B 3/00, H04M 3/10
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The patent has been granted
EP15763606

LINE FAULT CLASSIFICATION

IPC classification:
H04B 3/00, H04M 3/30, H04M 3/08
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The patent has been granted
EP16163434

TELECOMMUNICATIONS NETWORK

IPC classification:
H04W 24/02
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The application has been published
EP15817146

IMPROVED MULTICAST TO UNICAST CONVERSION

IPC classification:
H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
Request for examination was made
EP16190219

BEAMSTEERING USING METAMATERIALS

IPC classification:
H01Q 3/46, H01Q 3/26, H01Q 1/24, H01Q 15/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
The application has been published

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