EP0451056A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Telephonic electronic device
Assignee: Individual
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Filing: 1991-04-04
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Granted: —
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Expires: 2011-04-04
Abstract
Abstract The device includes an acoustic transmitter (10), a tone generator (12), a memory (14) containing an identification code (N) and a service key (C), and an electronic circuit (16). A digital message transmitted depends on N and C and changes with each use. The time limitation moment of the device is determined. The device appears in the form of a token.
Inventors
- 👤 Alain Bernard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 12:23
CPC Classifications
G; G07; G07F; G07F1/00; G07F1/06; G07C; G07C9/00; G07C9/20; G07C9/28; G07F7/00; G07F7/08; G07F7/0866
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
EP0061373A2
Cited
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