Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1989-10-25
1992-02-04
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
Patent
active
D03236218
REFERENCES:
patent: D251330 (1979-03-01), Kurosu
patent: D266855 (1982-11-01), Yoshioka
patent: D269353 (1983-06-01), Yokoyama
patent: D311158 (1990-10-01), Soule
patent: 4452119 (1984-06-01), Tanimoto
Adams Bruce L.
Holtje Nelson C.
Seikosha Co. Ltd.
Wilks Van C.
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