Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1990-08-31
1992-09-15
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
D11121
Patent
active
D03293939
REFERENCES:
patent: D225876 (1973-01-01), Massapequa
patent: D246578 (1977-12-01), White
patent: D247163 (1978-02-01), White
patent: D283989 (1986-05-01), Chen
patent: 2800187 (1957-07-01), Zehder
patent: 3802976 (1974-04-01), McMahon et al.
Burke Wallace R.
Jackson Marcus
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