Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1979-12-12
1982-05-11
Word, A. Hugo
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
D1005
Patent
active
D02643197
REFERENCES:
patent: D218652 (1970-09-01), Podall
patent: 3831157 (1974-08-01), Wiegand
patent: 4004228 (1977-01-01), Mullett
patent: 4266216 (1981-05-01), Trusty
Guscott John K.
Thornton H. Patrick
American District Telegraph Company
Word A. Hugo
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