Measuring – testing – or signalling instruments – Security or signal instrument or casing – Visual
Patent
1993-05-07
1994-06-28
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Visual
Patent
active
D03482308
REFERENCES:
patent: D286513 (1986-11-01), Au
patent: 1661242 (1928-03-01), Truxal
patent: 2225496 (1940-12-01), Gethin et al.
patent: 2371462 (1945-03-01), Nicholson
patent: 3785719 (1974-01-01), Jonnes
Burke Wallace R.
Jackson Marcus
Smith Hugh E.
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