Representative before the EPO

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Technology Company

Representative before the EPO

Technology company logo thumb
no operation time available
2 offices
Technology Company

Chi-Fai Lau has worked on the following 53 EPO patent applications which have been published in the last five years:

EP11250683

Data analysis system

IPC classification:
G06F 17/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP11752609

ADAPTIVE STREAMING OF VIDEO AT DIFFERENT QUALITY LEVELS

IPC classification:
H04N 7/24, H04N 21/2343, H04N 21/24, H04N 21/845
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
EXAMINATION REQUESTED
EP11250830

Line performance measure

IPC classification:
H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP11250831

Controlled access

IPC classification:
H04L 29/06, H04L 29/08
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP11250833

Controlled access

IPC classification:
H04L 29/06
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12704889

COMPACT CUMULATIVE BIT CURVES

IPC classification:
H04N 7/24
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
EXAMINATION IN PROGRESS
EP11250951

Assessing packet loss visibility in video

IPC classification:
G06T 7/00, H04N 17/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250081

Cable damage detection

IPC classification:
H04M 3/30, H04M 11/06
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:
H04B 3/46, H04M 3/22
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP13250047

Access network management

IPC classification:
H04L 12/24, H04L 12/28, H04M 3/42, H04M 11/06
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:
H04L 5/00, H04M 11/06
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:
G06T 7/00, H04N 17/00
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:
H04B 3/46, H04M 3/08, H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP12250183

Detection of data connection loss

IPC classification:
H04L 12/24, H04L 12/26
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:
H04L 29/06, H04N 21/61
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 21/258, H04N 21/472, H04N 21/6405
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 21/258, H04N 21/472, H04N 21/6405
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 3/38, H04M 3/42, H04M 3/436, H04M 7/00
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP12250187

Fault identification using line attenuations

IPC classification:
H04M 3/30, H04M 11/06
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 21/231, H04N 21/2343, H04N 21/433, H04N 21/845
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13719591

DROPCABLE

IPC classification:
G02B 6/44, H01B 1/04, H04B 1/04
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, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
APPLICATION REFUSED
EP13771168

WIRELESS ACCESS POINT

IPC classification:
H04W 48/02
Applicant:
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, 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:
EXAMINATION IN PROGRESS
EP13805464

FAULT LOCALISATION

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

OVERLOAD CONTROL FOR SESSION SETUPS

IPC classification:
H04L 29/06, H04L 29/08
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:
H04B 3/46, H04M 3/22
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:
H04L 12/24, H04L 12/28, H04M 3/42, H04M 11/06
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 21/231, H04N 21/2343, H04N 21/433, H04N 21/845
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
GRANT OF PATENT INTENDED
EP11250612

Video coding with quality control and rate control

IPC classification:
H04N 7/26
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
APPLICATION REFUSED
EP11804740

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

IPC classification:
H04L 12/811, H04L 12/911, H04L 12/927, H04L 29/06, H04N 19/146, H04N 19/154, H04N 19/177, H04N 19/18, H04N 21/2343, H04N 21/238, H04N 21/24, H04N 21/258, H04N 21/262, H04N 21/647
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
EP11714375

Video quality measurement

IPC classification:
H04N 17/00, H04N 19/117, H04N 19/154, H04N 19/17, H04N 19/44, H04N 19/86
Applicant:
British Telecommunications plc
Agent:
Multiple attorneys, British Telecommunications plc
Status:
PATENT GRANTED
EP11805128

VIDEO STREAMING OVER DATA NETWORKS

IPC classification:
H04L 12/801, H04L 12/811, H04L 12/911, H04L 12/927, H04L 29/06, H04N 19/115, H04N 19/152, H04N 19/154, H04N 19/177, H04N 19/192, H04N 19/44, H04N 21/2343, H04N 21/462
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
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
EP11724003

VIDEO STREAMING

IPC classification:
H04L 29/06, H04N 19/102, H04N 19/15, H04N 19/154, H04N 19/164, H04N 19/177, H04N 19/61, H04N 21/234, H04N 21/2343, H04N 21/24, H04N 21/2662, H04N 21/44, H04N 21/442, H04N 21/462
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Agent:
Chi-Fai Lau, British Telecommunications plc
Status:
NO OPPOSITION FILED WITHIN TIMELIMIT
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, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15710856

DYNAMIC LINE MANAGEMENT

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

MULTICAST STREAMING

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

MULTICAST STREAMING

IPC classification:
G06F 17/30, H04N 21/2343, H04N 21/438, H04N 21/6405, H04N 21/6408, H04N 21/845, H04W 76/00
Applicant:
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, BT Group Legal
Status:
EXAMINATION REQUESTED
EP15763607

OPTIMISED BROADBAND LINE TESTING

IPC classification:
H04B 3/00, H04M 3/10, H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
Request for examination was made
EP15763606

LINE FAULT CLASSIFICATION

IPC classification:
H04B 3/00, H04M 3/08, H04M 3/30
Applicant:
British Telecommunications plc
Agent:
Chi-Fai Lau, BT Group Legal
Status:
Request for examination was made
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

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