Measuring – testing – or signalling instruments – Security or signal instrument or casing – Lightning conductor or arrestor
Patent
1989-05-26
1991-12-24
Burke, Wallace R.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Lightning conductor or arrestor
Patent
active
D03225836
REFERENCES:
patent: D22207 (1893-02-01), Weston
patent: D29370 (1898-09-01), Wirt
patent: 3283297 (1966-11-01), Fennighausen et al.
patent: 3891919 (1975-06-01), Penninger
patent: 4276576 (1981-06-01), Uman et al.
patent: 4803421 (1989-02-01), Ostsander
patent: 4823115 (1989-04-01), McCallie
patent: 4912459 (1990-03-01), McCallie
Radio and Television 3/1950 p. 12 Marker Generator.
Burke Wallace R.
Jackson Marcus
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