GB2272822B - A broadcasting system - Google Patents

A broadcasting system

Info

Publication number
GB2272822B
GB2272822B GB9321202A GB9321202A GB2272822B GB 2272822 B GB2272822 B GB 2272822B GB 9321202 A GB9321202 A GB 9321202A GB 9321202 A GB9321202 A GB 9321202A GB 2272822 B GB2272822 B GB 2272822B
Authority
GB
United Kingdom
Prior art keywords
broadcasting system
broadcasting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB9321202A
Other versions
GB9321202D0 (en
GB2272822A (en
Inventor
Shunichi Momiki
Makoto Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Corp
Original Assignee
Mitsubishi Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=17576546&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2272822(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mitsubishi Corp filed Critical Mitsubishi Corp
Priority to GB9526301A priority Critical patent/GB2296171B/en
Publication of GB9321202D0 publication Critical patent/GB9321202D0/en
Publication of GB2272822A publication Critical patent/GB2272822A/en
Application granted granted Critical
Publication of GB2272822B publication Critical patent/GB2272822B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/93Wired transmission systems
    • H04H60/94Telephonic networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/15Arrangements for conditional access to broadcast information or to broadcast-related services on receiving information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/16Arrangements for conditional access to broadcast information or to broadcast-related services on playing information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/21Billing for the use of broadcast information or broadcast-related information
    • H04H60/22Billing for the use of broadcast information or broadcast-related information per use
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H60/00Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14Arrangements for conditional access to broadcast information or to broadcast-related services
    • H04H60/23Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/254Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2543Billing, e.g. for subscription services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334Recording operations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/472End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47211End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting pay-per-view content
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633Control signals issued by server directed to the network components or client
    • H04N21/6332Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/162Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/162Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/165Centralised control of user terminal ; Registering at central
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/167Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309Transmission or handling of upstream communications
    • H04N7/17318Direct or substantially direct transmission and handling of requests
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/765Interface circuits between an apparatus for recording and another apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
GB9321202A 1992-10-15 1993-10-14 A broadcasting system Expired - Fee Related GB2272822B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9526301A GB2296171B (en) 1992-10-15 1993-10-14 Playing apparatus for signal use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4276941A JPH06132916A (en) 1992-10-15 1992-10-15 Receiving device

Publications (3)

Publication Number Publication Date
GB9321202D0 GB9321202D0 (en) 1993-12-01
GB2272822A GB2272822A (en) 1994-05-25
GB2272822B true GB2272822B (en) 1996-02-21

Family

ID=17576546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9321202A Expired - Fee Related GB2272822B (en) 1992-10-15 1993-10-14 A broadcasting system

Country Status (6)

Country Link
JP (1) JPH06132916A (en)
DE (1) DE4334931A1 (en)
FR (1) FR2697124B1 (en)
GB (1) GB2272822B (en)
HK (5) HK1001944A1 (en)
SG (1) SG96536A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7804958B2 (en) 2000-07-21 2010-09-28 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US8140859B1 (en) 2000-07-21 2012-03-20 The Directv Group, Inc. Secure storage and replay of media programs using a hard-paired receiver and storage device
US8272020B2 (en) 2002-08-17 2012-09-18 Disney Enterprises, Inc. System for the delivery and dynamic presentation of large media assets over bandwidth constrained networks
US9325944B2 (en) 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE38898E1 (en) 1994-05-24 2005-11-29 Sony Corporation Video data bus communication system and method
EP1737184A3 (en) 1994-05-24 2007-01-24 Sony Corporation Data bus communication
JP3381715B2 (en) * 1994-05-24 2003-03-04 ソニー株式会社 Data storage device and data reproduction device
JPH088853A (en) * 1994-06-24 1996-01-12 Sony Corp Scrambling device and descrambling device
USRE38529E1 (en) 1994-06-24 2004-06-08 Sony Corporation Scramble/descramble method and apparatus for data broadcasting
EP1126705B1 (en) * 1994-07-08 2009-06-24 Sony Corporation Receiving controlled - access broadcast signals
JPH0832530A (en) * 1994-07-15 1996-02-02 Sony Corp Data broadcast system and data receiver
EP0702493A1 (en) * 1994-09-19 1996-03-20 International Business Machines Corporation Interactive playout of videos
JPH08110921A (en) * 1994-10-11 1996-04-30 Takaaki Iwamoto Multi-service system and multi-service card device using card-like recording medium
DE69532434T2 (en) 1994-10-27 2004-11-11 Mitsubishi Corp. Device for file copyright management system
JP3857644B2 (en) * 1994-10-28 2006-12-13 ソニー株式会社 Digital signal transmitting / receiving system and digital signal receiving apparatus
JP3729529B2 (en) * 1994-10-28 2005-12-21 ソニー株式会社 Digital signal transmission / reception system
JP3318699B2 (en) * 1994-10-31 2002-08-26 ソニー株式会社 Digital signal receiving system
JP3332299B2 (en) * 1994-12-15 2002-10-07 株式会社エクシング Information processing terminal and information providing system
JPH08171393A (en) * 1994-12-15 1996-07-02 Ekushingu:Kk Information processing terminal and information presentation system
MY121551A (en) 1994-12-22 2006-02-28 Sony Corp Recording and reproducing system for protecting copyrighted data
JP3540041B2 (en) * 1995-01-24 2004-07-07 株式会社エクシング Information processing device and information providing system
JP3407476B2 (en) * 1995-06-07 2003-05-19 松下電器産業株式会社 Information reception display device
JP3837753B2 (en) * 1995-06-15 2006-10-25 ソニー株式会社 Scramble broadcasting system, scramble method, scramble device, and descramble device
US6388714B1 (en) 1995-10-02 2002-05-14 Starsight Telecast Inc Interactive computer system for providing television schedule information
WO1997015132A1 (en) * 1995-10-19 1997-04-24 Casio Computer Co., Ltd. Scrambled information transmitting and receiving
GB2312599A (en) * 1996-04-22 1997-10-29 Adeyinka Layeni Home movies
IL130101A0 (en) 1996-12-10 2000-06-01 United Video Properties Inc Internet television program guide system
JPH10200866A (en) * 1997-01-06 1998-07-31 Matsushita Electric Ind Co Ltd Broadcast signal transmission and reception facility
CN1867068A (en) 1998-07-14 2006-11-22 联合视频制品公司 Client-server based interactive television program guide system with remote server recording
JP4253875B2 (en) 1998-09-30 2009-04-15 ソニー株式会社 Transmission method and transmission device, reception method and reception device, transmission method and transmission system
US6865746B1 (en) 1998-12-03 2005-03-08 United Video Properties, Inc. Electronic program guide with related-program search feature
JP2000261778A (en) * 1999-03-09 2000-09-22 Nec Corp Pay broadcast charging system and receiver in its system
CA2325647A1 (en) * 1999-11-10 2001-05-10 Scott Casavant Method and apparatus for background caching of encrypted programming data for later playback
JP2000216771A (en) * 2000-01-01 2000-08-04 Sony Corp Scrambling system and descrambling system
JP2002051018A (en) * 2000-07-31 2002-02-15 Toshiba Corp Contents data providing method utilizing data broadcast and recording medium with program executing method recorded therein
JP4634664B2 (en) * 2000-08-17 2011-02-16 パナソニック株式会社 Information communication system
JP5068398B2 (en) * 2000-08-17 2012-11-07 Necディスプレイソリューションズ株式会社 Receiver and content distribution method
JP2002094473A (en) * 2000-09-11 2002-03-29 Victor Co Of Japan Ltd Terminal for purchasing program, decoding key storage device, and program-purchasing system
JP2001268537A (en) * 2001-02-13 2001-09-28 Mitsubishi Corp Method for supplying program and program receiver
DE10203098B4 (en) * 2002-01-25 2004-09-02 datacargo Gesellschaft für elektronischen Datenverkehr mbH Method of providing video / audio on demand
JP3954906B2 (en) * 2002-06-17 2007-08-08 ソニー株式会社 Data distribution system and method, receiving apparatus and method
BR0313804A (en) * 2002-08-21 2005-07-05 Disney Entpr Inc Home Digital Film Library
US20060047602A1 (en) * 2004-08-31 2006-03-02 Grace James R Buffering scheme for storage of broadcast content
KR100636965B1 (en) * 2004-10-19 2006-10-19 (주)토필드 Apparatus and method for copy a scrambled recording file
JP4582653B2 (en) * 2006-05-09 2010-11-17 ソフトバンクモバイル株式会社 Content download system
US8775319B2 (en) 2006-05-15 2014-07-08 The Directv Group, Inc. Secure content transfer systems and methods to operate the same
MX2010010368A (en) * 2008-03-31 2010-11-25 Echostar Technologies Llc Systems, methods and apparatus for transmitting data over a voice channel of a wireless telephone network.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003830A1 (en) * 1984-02-23 1985-08-29 American Telephone & Telegraph Company Method and apparatus for subscription broadcast
US4710955A (en) * 1985-11-25 1987-12-01 General Instrument Corporation Cable television system with two-way telephone communication path
US4751732A (en) * 1984-07-06 1988-06-14 Kabushiki Kaisha Toshiba Broadcasting system
GB2231244A (en) * 1989-04-10 1990-11-07 Pioneer Electronic Corp CATV system indicates whether a user requested program has been allowed
EP0489385A2 (en) * 1990-12-06 1992-06-10 EDICO S.r.l. System for the transmission and reception of encoded television signals
US5144663A (en) * 1986-04-18 1992-09-01 Kudelski S.A. Fabrique D'engregistreurs Nagra Method of interactive communication between a subscriber and a decoder of a system of pay-television and decoder thereof
WO1993007715A1 (en) * 1991-10-03 1993-04-15 Thomson Consumer Electronics S.A. Method and apparatus for customizing a device with a smart card

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2067871A (en) * 1980-01-19 1981-07-30 Marconi Co Ltd Information Encoding Systems
JPS56106481A (en) * 1980-01-29 1981-08-24 Matsushita Electric Ind Co Ltd Television receiving device
DE3133179A1 (en) * 1981-08-19 1983-03-10 Helmut Dipl.-Ing. 6233 Kelkheim Krätzer Replay device for video recordings on magnetic tape or disc
DE3235344A1 (en) * 1982-05-10 1984-03-01 npm new production marketing, 2000 Hamburg Copying-protected prerecorded video cassette and method and coder for producing and method and decoder for playing such a video cassette
US4890322A (en) * 1984-02-23 1989-12-26 American Telephone And Telegraph Company Method and apparatus for subscription broadcast
US4807286A (en) * 1987-04-22 1989-02-21 Wiedemer John D High security pay television system
JP2735564B2 (en) * 1988-05-10 1998-04-02 日立マクセル株式会社 Communications system
JP2682030B2 (en) * 1988-07-29 1997-11-26 松下電器産業株式会社 Signal recording device
DE69121444T2 (en) * 1990-03-29 1997-03-13 Gte Laboratories Inc Monitoring system for the transmission of video signals
JPH0415811A (en) * 1990-05-09 1992-01-21 Toshiba Corp Work station device
JP3023160B2 (en) * 1990-10-11 2000-03-21 日本放送協会 Broadcast reception control method
JPH04155658A (en) * 1990-10-18 1992-05-28 Mitsubishi Electric Corp Recording/reproducing apparatus
US5123046A (en) * 1990-11-05 1992-06-16 Smart Vcr Limited Partnership Vcr with cable tuner control

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003830A1 (en) * 1984-02-23 1985-08-29 American Telephone & Telegraph Company Method and apparatus for subscription broadcast
US4751732A (en) * 1984-07-06 1988-06-14 Kabushiki Kaisha Toshiba Broadcasting system
US4710955A (en) * 1985-11-25 1987-12-01 General Instrument Corporation Cable television system with two-way telephone communication path
US5144663A (en) * 1986-04-18 1992-09-01 Kudelski S.A. Fabrique D'engregistreurs Nagra Method of interactive communication between a subscriber and a decoder of a system of pay-television and decoder thereof
GB2231244A (en) * 1989-04-10 1990-11-07 Pioneer Electronic Corp CATV system indicates whether a user requested program has been allowed
EP0489385A2 (en) * 1990-12-06 1992-06-10 EDICO S.r.l. System for the transmission and reception of encoded television signals
WO1993007715A1 (en) * 1991-10-03 1993-04-15 Thomson Consumer Electronics S.A. Method and apparatus for customizing a device with a smart card

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7804958B2 (en) 2000-07-21 2010-09-28 The Directv Group, Inc. Super encrypted storage and retrieval of media programs with smartcard generated keys
US8140859B1 (en) 2000-07-21 2012-03-20 The Directv Group, Inc. Secure storage and replay of media programs using a hard-paired receiver and storage device
US8272020B2 (en) 2002-08-17 2012-09-18 Disney Enterprises, Inc. System for the delivery and dynamic presentation of large media assets over bandwidth constrained networks
US9325944B2 (en) 2005-08-11 2016-04-26 The Directv Group, Inc. Secure delivery of program content via a removable storage medium

Also Published As

Publication number Publication date
DE4334931A1 (en) 1994-04-28
SG96536A1 (en) 2003-06-16
JPH06132916A (en) 1994-05-13
FR2697124A1 (en) 1994-04-22
GB9321202D0 (en) 1993-12-01
GB2272822A (en) 1994-05-25
HK1002720A1 (en) 1998-09-11
HK1001942A1 (en) 1998-07-17
HK1001944A1 (en) 1998-07-17
HK1001943A1 (en) 1998-07-17
FR2697124B1 (en) 1995-09-08
HK1001945A1 (en) 1998-07-17

Similar Documents

Publication Publication Date Title
GB2272822B (en) A broadcasting system
GB2272823B (en) Pay broadcasting system
GB2269220B (en) A valving system
GB9401361D0 (en) A radar system
GB2285902B (en) Digital broadcast systems
GB9205344D0 (en) System
GB2271690B (en) A communications system
GB2264208B (en) A loudspeaker system
GB2295947B (en) Pay broadcasting system
GB9205342D0 (en) System
GB2270998B (en) Positioning system
GB9213594D0 (en) A steam-raising system
GB9120462D0 (en) A location system
GB9203268D0 (en) A metering system
VN248A1 (en) A clamp system
GB9212407D0 (en) A control system
GB9104139D0 (en) A minelaying system
GB9209012D0 (en) A satellite system
GB9208925D0 (en) System
GB9206683D0 (en) Glazin system
GB9222139D0 (en) A constructional system
GB9208343D0 (en) A feeding system
GB2305832B (en) Pay broadcasting system
GB9201322D0 (en) A fastening system
GB9204576D0 (en) A fastening system

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20041014