Measuring – testing – or signalling instruments – Security or signal instrument or casing – Alarm or control thereof
Patent
1990-06-12
1992-08-04
Walsh, Donald P.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Alarm or control thereof
D10 78, D10 75
Patent
active
D03284409
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patent: D308347 (1990-06-01), Bryenton et al.
patent: 4335375 (1982-06-01), Schaeffer
patent: 4990888 (1991-02-01), Vogt et al.
patent: 5015840 (1991-05-01), Blau
Davis Antoine D.
Metrum Corporation
O'Meara William P.
Walsh Donald P.
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