Measuring – testing – or signalling instruments – Security or signal instrument or casing – Visual
Patent
1985-06-04
1988-04-05
Kemper, Catherine E.
Measuring, testing, or signalling instruments
Security or signal instrument or casing
Visual
Patent
active
D02950260
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patent: 2333273 (1943-11-01), Scanlon
patent: 2957444 (1960-10-01), Boettler
patent: 3247823 (1966-04-01), Buck et al.
patent: 3596628 (1971-08-01), Wright
patent: 3618556 (1971-11-01), Dittrich
patent: 3696237 (1972-10-01), Whitehead
patent: 3707320 (1972-12-01), Brynes
patent: 3922998 (1975-12-01), May
patent: 4292627 (1981-09-01), Knight
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