Keypad for a security alarm system

Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof

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D03467554

REFERENCES:
patent: D312221 (1990-11-01), Steele et al.
patent: D326619 (1992-06-01), Soloway
patent: 4581605 (1986-04-01), Vogt
patent: 4755792 (1988-07-01), Pezzolo et al.
patent: 5004999 (1991-04-01), Hartmann et al.

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