Measuring – testing – or signalling instruments – Security or signal instrument or casing – Aural – i.e. – audible
Patent
1980-03-03
1982-10-12
Lucas, Susan J.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Aural, i.e., audible
D1006
Patent
active
D02664925
REFERENCES:
patent: D32982 (1900-07-01), Jackson
patent: 2056623 (1936-10-01), Scott
patent: 3139087 (1964-06-01), Liberatore
Oppermann, Jr. Karl E.
Oppermann, Sr. Karl E.
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