Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1986-08-06
1988-08-23
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
D29 6
Patent
active
D02973170
REFERENCES:
patent: D248283 (1978-06-01), Kitts et al.
patent: 4326200 (1982-04-01), Bushman
Unico brochure, "Carbon Monoxide Alarm Model 777".
Popular Science, Oct. 1980, p. 80, Gas Snifers, Electronics Sentinels Model "A".
Burke Wallace R.
Chin Kay H.
Dicon Systems Limited
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