CA642144A - Subscription television system - Google Patents

Subscription television system

Info

Publication number
CA642144A
CA642144A CA642144A CA642144DA CA642144A CA 642144 A CA642144 A CA 642144A CA 642144 A CA642144 A CA 642144A CA 642144D A CA642144D A CA 642144DA CA 642144 A CA642144 A CA 642144A
Authority
CA
Canada
Prior art keywords
television system
subscription television
subscription
television
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
Application number
CA642144A
Inventor
M. Roschke Erwin
G. Eilers Carl
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.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
Publication date
Application granted granted Critical
Publication of CA642144A publication Critical patent/CA642144A/en
Expired legal-status Critical Current

Links

CA642144A Subscription television system Expired CA642144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA642144T

Publications (1)

Publication Number Publication Date
CA642144A true CA642144A (en) 1962-06-05

Family

ID=35920667

Family Applications (1)

Application Number Title Priority Date Filing Date
CA642144A Expired CA642144A (en) Subscription television system

Country Status (1)

Country Link
CA (1) CA642144A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642688A (en) * 1983-06-24 1987-02-10 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals
US5553141A (en) * 1982-07-12 1996-09-03 Scientific-Atlanta, Inc. Encryption and decryption (scrambling and unscrambling) of video signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553141A (en) * 1982-07-12 1996-09-03 Scientific-Atlanta, Inc. Encryption and decryption (scrambling and unscrambling) of video signals
US4642688A (en) * 1983-06-24 1987-02-10 Scientific Atlanta, Inc. Method and apparatus for creating encrypted and decrypted television signals

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