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
D02973189
REFERENCES:
patent: D242660 (1976-12-01), Astle
patent: D260378 (1981-08-01), Mallory
patent: D270625 (1983-09-01), Hiltenbrand
patent: D274506 (1984-07-01), Hiltenbrand
patent: D276281 (1984-11-01), Landgren
patent: 3949390 (1976-04-01), Rayl
patent: 4012729 (1977-03-01), Weaver et al.
patent: 4245174 (1981-01-01), Mallory et al.
Burke Wallace R.
Chin Kay H.
Dicon Systems Limited
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