TW563364B - Method of, and means for, delivering information services over the air - Google Patents

Method of, and means for, delivering information services over the air Download PDF

Info

Publication number
TW563364B
TW563364B TW090120268A TW90120268A TW563364B TW 563364 B TW563364 B TW 563364B TW 090120268 A TW090120268 A TW 090120268A TW 90120268 A TW90120268 A TW 90120268A TW 563364 B TW563364 B TW 563364B
Authority
TW
Taiwan
Prior art keywords
information
instructions
text
packet
transmitting
Prior art date
Application number
TW090120268A
Other languages
English (en)
Inventor
Barry Jones
Original Assignee
Koninkl Philips Electronics Nv
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
Priority claimed from GB0006678A external-priority patent/GB0006678D0/en
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Application granted granted Critical
Publication of TW563364B publication Critical patent/TW563364B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • H04N21/2351—Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving encryption of additional data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing 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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H04N21/4353—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving decryption of additional data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/478—Supplemental services, e.g. displaying phone caller identification, shopping application
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network 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 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6137—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a telephone network, e.g. POTS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0888—Subscription systems therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Television Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Description

563364 A7 B7 五、發明説明（1 ) 技術蓺圚 本發明為有關經由空中傳遞資訊服務之方法及裝置。 技藝背景 在網路伺服器與個人電腦（PC)間之資訊服務已經存在許 多年。部分服務包括資訊取回以及企業活動，例如銀行、 保險和電子化商業，統稱為電子商業e_commerce。最近有 許多發展，對於例如手機等可攜式電信通訊裝置之使用者 而言，使得網際網路服務變得有效。對於大部分而言，這 些服務已經下載了用以在内建於裝置中之顯示頻道上顯示 用之資料。 對於更多的網路服務而言，例如使用者可選擇的訂閱服 務，有日漸更多的需求，以便使得其他例如電視接收器之 裝置可讓使用者使用。已知將電視接收器當作家庭的電子 郵件e-mau安裝之影像顯示單元使用，其中包括連接電子 郵,e-mail數據機以及電視接收器之鍵盤。雖然這樣的系 統疋在使用中，仍需要使用者將鍵盤與數據機分開。 本發明之福霪 本發明主題之-為，將具有例如電視接收器之顯示裝置 之選擇的使用者傳遞資訊與接收資訊簡單化。 根據本發明之第-點，對於具有接收播送文字服務能力 之顯示裝置，提供-種傳遞資訊服務之方法，包括至少指 定-文字頁以傳遞資訊服務、接收資訊，括指令之資 訊加密、格式化已加密的資訊與指令以便當作封包訊息信 號、傳送已格式化的封包訊息信號以便作為至少一頁的文
563364
便D 1收至少一頁文字頁、解密與分析封包訊息信號以 Z復指令，以及使用指令以便操作以及/ 顯示所 的資訊。 统根=本=明之第二點，提供一種用以傳遞資訊服務之系 I括貝訊來源、用以加密資訊以便包含指令之裝置、 =二格式化資訊與指令以便當作封包訊息信號之裝置、用 以合併封包訊息信號和已預定的文字頁與用以傳送該文字 頁之文=中心、包含信號接收裝置與用以分析封包訊息信 "中之扎々之終端器之顯示裝置，以及用以決定接收裝置 以回應指令，以便操作以及/或是顯示所要的資訊之裝置。 &根據本發明之第三點，提供一種具有接收播送文字服務 月b力之顯示裝置，包括用以分析在至少一已預定的文字頁 中所傳送之封包訊息信號中所出現之指令之終端器，以及 用以決定顯示裝置，以便回應指令之裝置。 根據本發明之第四點，提供一種用以傳遞資訊服務至具 有接收播送電傳文字服務能力之電視接收器之使用者之裝 置，此裝置包括資訊來源、用以加密資訊以便包含指令之 裝置、用以格式化資訊與指令以便當作封包訊息信號之裝 置用以σ併封包祝息#號和已預定的文字頁並用以傳送 該文字頁之電傳文字中心。 根據本發明之第五點，提供一種包括文字頁之信號，此 文字頁至少包括一個封包訊息信號，而此封包訊息信號包 括加密的資訊與指令。 經由將資訊服務當作文字頁提供給電視接收器，使用者 ___ _ -5- 本纸張尺度適用中國國家標準(CNS) Α4規格(210 X 297公复y 563364 A7 B7 五、發明説明（3 ) '~^~' - 可自由選擇文字頁，並使用電視遠端控制器以便控制將要 顯示的訊息。 的簡I _沭 現在本發明將以範例說明，請參考附錄圖表，其中： 圖1為與電傳文字電視接收器連同一起使用之資訊服務 傳遞系統之架構方塊圖，以及 圖2為電視接收器之架構方塊圖。 在圖表中相同的參考數字用來代表相關的特徵。 iL行本發明的方法 參考圖1，圖示出的架構包括資訊來源，此資訊來源包 =一個適當地連接至服務提供器12之網路伺服器1〇。服務 提供器加密資訊並加入指令，其中在適當的顯示裝置上， 例如電傳文字電視接收器20 ,經由合併到接收器内之終端 器22分析，並用來決定顯示裝置，以便操作以及/或是顯 示資訊。顯示裝置可能包括類似的電視接收器、數位電視 接收器或是電視接收器與機上盒的結合體。 來自服務提供器12之輸出傳統上包括短訊息服務（SMS) Λ心、電子郵件訊息以及/或是其他嵌入式訊息。在 訊息中，訊息袼式化為位元組串流資料封包訊息，這些訊 息重新放置於電傳文字中心14，在此處合併至電傳文字頁 中以便專注於傳遞短訊息至合併終端器22之顯示裝置，例 如電視接收器20,或是至包含終端器22之機上盒。終端器 實際上為儲存於處理器中之套裝軟體，而處理器可能整合 至接收器電路之中，或包括一獨立的膜組。電傳文字頁重 本紙張尺度適财s S家標準(C兩--- 563364 A7 B7 五、發明説明（4 ) 新放置於電視傳送器1 6，以當作播送信號1 8而傳送。 為了描述方便，假定顯示裝置為電視接收器’經由包括 終端器22之接收器20選取播送信號18。選取有關的電傳文 字頁經由具有遠端控制器24之使用者所控制’其中控制器 24散發紅外線信號，此信號經由接收器20上之感應器26所 偵測到。一旦選取了與訊息服務有關的頁後，除了在電傳 文字信號處理中已經分析過的指令外，顯示訊息在電視螢 幕2 6上。 經由將終端器22嵌入至電視接收器20 (或機上盒STB)中 ’並將其與特定的電傳文字頁或頁連接起來，則例如電子 郵件訊息、短訊息與喪入式訊息等資訊可經由網路祠服器 重新放置於訂閱者的電視接收器20上，並以相同格式的電 傳文字信號顯示。不具有終端器或適當授權的接收器2〇無 法解密與回復播送信號丨8中之訊息。 圖2中所示之電視接收器包括紅外線接收器站3〇，其輸 出連接至解碼器32。解碼器32之輸出連接至影像信號處理 裔34 ’此信號處理器34具有連接至具有顯示螢幕26之陰極 射線管38之輸出36。處理器34之另一輸出39提供影像信號 給電傳文字電路40。 时電傳文字電路40包括用以回復電傳文字信號之影像處理 為4 一2 ’電傳文子信號以所知每秒播送電視傳遞方式之空白 隔而傳运。電傳文字資料獲得與控制（tac)站44連接至 #像處理H42H終端器22連接至tac站料以便解密 接收的n以及分析包含在SMS電傳文字頁之傳遞中之
裝 訂
k

Claims (1)

  1. 563364
    1 · 一種傳遞資訊服務至具有接收播送文字服務能力之顯示 裝置之方法’包括指定至少一文字頁至資訊服務傳遞， 接收資訊’加密資訊以包括指令，格式化已加密的資訊 與指令以當作封包訊息信號，傳送已格式化的封包訊息 信號以當作至少一文字頁，接收至少一文字頁，解密與 为析封包机息信號以便回復指令，以及使用指令以便操 作及/或顯示所要的資訊。 2 ·如申請專利範圍第1項之方法，其中封包訊息信號格式 化為知》sfL息服務（S M S)信號。 3.如申請專利範圍第1或第2項之方法，其中封包訊息信 號包括資訊服務辨識器，而顯示裝置經由資訊服務辨識 器啟動，以便接收在至少一頁文字頁中所傳送之資訊服 務。 4·一種用以傳遞資訊服務之系統，包括資訊來源、用以加 密資訊以包含指令之裝置，用以格式化資訊與指令以當 作封包訊息信號之裝置，用以合併封包訊息信號與已予^ 定的文字頁及用以傳送該文字頁之文字中心，包含作號 接收裝置與用以分析封包訊息信號中之指令之終端器之^ 顯示裝置，以及用以決定接收裝置以回應指令，以便操 作及/或顯示所要的資訊之裝置。 ” 5·—種具有接收播送文字服務能力之顯示裝置，包括用以 分析在至少一已預定的文字頁中所傳送之封包訊息#號 中所出現之指令之從屬終端器，以及用以調整顯示誓置 ，以便回應指令之裝置。
    563364 A8 B8 C8 D8 六、申請專利範圍 6. —種用以傳遞資訊服務至具有接收播送電傳文字服務能 力之顯示裝置之使用者之裝置，此裝置包括資訊來源， 用以加密資訊以便包含指令之裝置，用以格式化資訊與 指令以便當作封包訊息信號之裝置，用以合併封包訊息 信號和已預定的文字頁及用以傳送該文字頁之文字中心。 -2- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
TW090120268A 2000-03-21 2001-08-17 Method of, and means for, delivering information services over the air TW563364B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0006678A GB0006678D0 (en) 2000-03-21 2000-03-21 Method of, and means for, delivering internet services over the air
GB0017977A GB0017977D0 (en) 2000-03-21 2000-07-22 Method of, abd means for delivering information service over the air

Publications (1)

Publication Number Publication Date
TW563364B true TW563364B (en) 2003-11-21

Family

ID=26243911

Family Applications (1)

Application Number Title Priority Date Filing Date
TW090120268A TW563364B (en) 2000-03-21 2001-08-17 Method of, and means for, delivering information services over the air

Country Status (3)

Country Link
US (1) US20020003882A1 (zh)
TW (1) TW563364B (zh)
WO (1) WO2001072038A2 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI554112B (zh) * 2004-07-01 2016-10-11 瑞科信公司 接收數位及類比電視信號的電視接收器

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8201196B2 (en) * 2002-05-31 2012-06-12 Comverse, Ltd. Method and system for conveying SMS messages via a TV communication infrastructure for receipt by a TV set-top box
WO2004023805A1 (en) * 2002-09-06 2004-03-18 Koninklijke Philips Electronics N.V. Television receiver, method of providing a message to such a receiver, and system arranged to execute such a method
FR2855928B1 (fr) * 2003-06-03 2005-12-09 Texas De France Systeme de transmission de messages numeriques par liaison hertzienne terrestre, par cable ou par satellite
US8763036B2 (en) * 2005-11-04 2014-06-24 Nokia Corporation Method for indicating service types in the service guide
US8259568B2 (en) * 2006-10-23 2012-09-04 Mcafee, Inc. System and method for controlling mobile device access to a network
KR20150061717A (ko) * 2013-11-27 2015-06-05 한국전자통신연구원 콘텍스트 관리장치 및 그 방법

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829569A (en) * 1984-09-21 1989-05-09 Scientific-Atlanta, Inc. Communication of individual messages to subscribers in a subscription television system
US4890321A (en) * 1986-07-08 1989-12-26 Scientific Atlanta, Inc. Communications format for a subscription television system permitting transmission of individual text messages to subscribers
GB2197167A (en) * 1986-10-03 1988-05-11 Philips Electronic Associated Teletext decoders
US5790198A (en) * 1990-09-10 1998-08-04 Starsight Telecast, Inc. Television schedule information transmission and utilization system and process
IL106746A (en) * 1993-08-19 1997-02-18 News Datacom Ltd CATV systems
US5519780A (en) * 1993-12-03 1996-05-21 Scientific-Atlanta, Inc. System and method for providing compressed digital teletext services and teletext support services
WO1995034993A1 (en) * 1994-06-16 1995-12-21 Philips Electronics N.V. Method of transmitting teletext pages
DE69637452D1 (de) * 1995-07-31 2008-04-17 Toshiba Kawasaki Kk Interaktives Fernsehsystem
JPH0993550A (ja) * 1995-09-22 1997-04-04 Toshiba Corp 補完番組検知及び表示装置
US6199206B1 (en) * 1995-10-24 2001-03-06 Sony Corporation Television transmitter, television transmitting method, television receiver and television receiving method
US5920822A (en) * 1996-01-18 1999-07-06 Telefonaktiebolaget Lm Ericsson (Publ) Formatting of short message service messages in a cellular telephone network
FI102869B (fi) * 1996-02-26 1999-02-26 Nokia Mobile Phones Ltd Laite, menetelmä ja järjestelmä eri sovelluksiin liittyvien tietojen l ähettämiseksi ja vastaanottamiseksi
FI100441B (fi) * 1996-04-09 1997-11-28 Nokia Mobile Phones Ltd Valikko-ohjattu lyhytsanomien muodostus
US5995092A (en) * 1996-08-30 1999-11-30 Yuen; Henry C. Television system and method for subscription of information services
GB2320405B (en) * 1996-12-13 2001-06-27 Ibm System, method, and pointing device for remote operation of data processing apparatus
US6125281A (en) * 1997-01-31 2000-09-26 Nokia Mobile Phones Limited Real-time SMS application messaging using an SMSC-linked server
DE69734275T2 (de) * 1997-05-23 2006-06-29 Koninklijke Kpn N.V. Mobiles Kommunikationssystem, mobiles Kommunikationsgerät und Verfahren zur Übertragung von Rückrufanfragen und längeren Mitteilungen
AU741869B2 (en) * 1997-05-27 2001-12-13 Siemens Aktiengesellschaft Mobile station
US6111612A (en) * 1997-07-10 2000-08-29 Thomson Consumer Electronics System for forming and processing text data for use in program specific information for broadcast
FI107097B (fi) * 1997-09-24 2001-05-31 Nokia Networks Oy Kohdistettu yleislähetys radioverkossa
NO982495D0 (no) * 1998-06-02 1998-06-02 Net 2 Interaktiv As SMS-basert pratelinje pÕ tekst-TV
US6665870B1 (en) * 1999-03-29 2003-12-16 Hughes Electronics Corporation Narrative electronic program guide with hyper-links
US6266094B1 (en) * 1999-06-14 2001-07-24 Medialink Worldwide Incorporated Method and apparatus for the aggregation and selective retrieval of television closed caption word content originating from multiple geographic locations
US6697421B1 (en) * 1999-11-19 2004-02-24 Intel Corporation Operator independent, transparent wireless modem management
US6766163B1 (en) * 1999-12-09 2004-07-20 Nokia Corpoaration Method and system of displaying teletext information on mobile devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI554112B (zh) * 2004-07-01 2016-10-11 瑞科信公司 接收數位及類比電視信號的電視接收器

Also Published As

Publication number Publication date
US20020003882A1 (en) 2002-01-10
WO2001072038A3 (en) 2002-04-18
WO2001072038A2 (en) 2001-09-27

Similar Documents

Publication Publication Date Title
KR100767098B1 (ko) 디지털 방송 수신기 구성
AU2002222974B2 (en) Secure packet-based data broadcasting architecture
US8065742B2 (en) Delivering specific contents to specific recipients using broadcast networks
US8477944B2 (en) Communication system, base station apparatus and terminal apparatus
US20140032756A1 (en) Device communication
AU2002222974A1 (en) Secure Packet-based Data Broadcasting Architecture
JPH09511369A (ja) パケットベース多重通信システムにおけるデコーダへ条件付きアクセス情報を送るための方法
JP2008545289A (ja) ストリーミングコンテンツの微粒度権利（ｆｉｎｅｇｒａｉｎｒｉｇｈｔｓ）マネージメント
KR20090049041A (ko) 통합된 크로스 미디어 서비스
US7567793B1 (en) Information system, mobile communication terminal, and information method
US8306223B2 (en) Method and a system for transmitting encrypted control message based on mobile multimedia broadcast
JP2008234621A (ja) 情報収集装置、コード表示装置、情報収集方法及び情報収集システム
WO2019036263A1 (en) TRANSPORT AND ACQUISITION OF INFORMATION RELATING TO DRM
JP2006222496A (ja) デジタル映像受信装置およびデジタル映像受信システム
TW563364B (en) Method of, and means for, delivering information services over the air
JP5059616B2 (ja) マルチメディアコンテンツの安全な転送およびプレイバックのための方法および装置
US20070245366A1 (en) Display/response system, show display apparatus and show display program storage medium
WO2008081978A1 (ja) ケーブル、および方法
US20060053473A1 (en) System and method of image distribution
JPH11328056A (ja) 電子メールサービスシステム
JP3780563B2 (ja) 有料放送システムおよび方法、放送受信端末および方法、ならびに、視聴情報収集システムおよび方法
KR100875416B1 (ko) 디지털 티브이의 메신저 기능 지원 방법
JP4186976B2 (ja) 放送受信方法
JP2022181737A (ja) 番組予約装置、番組予約プログラム、アドレス情報取得方法および番組予約方法
JP5762854B2 (ja) 通信システム

Legal Events

Date Code Title Description
GD4A Issue of patent certificate for granted invention patent