Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent
1987-03-02
1990-03-13
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Aural, i.e., audible
Patent
active
D03065650
REFERENCES:
patent: D292179 (1987-10-01), Levin
Sign of the Times 8/83, p. 15, First National Bank sign.
Erdall Margaret A.
Pawlik James P.
Burke Wallace R.
Jackson Marcus
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