Measuring – testing – or signalling instruments – Security or signal instrument or casing – Lost child or person locator
Patent
1978-11-02
1981-08-25
Stallard, W.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Lost child or person locator
D10106, D10121, D1005
Patent
active
D02603780
REFERENCES:
patent: D228263 (1973-08-01), Jones
patent: D252172 (1979-06-01), Carroll
patent: 1334046 (1920-03-01), Opgenorth
Isotec Industries Limited
Stallard W.
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