Measuring – testing – or signalling instruments – Watch – wristwatch or case – Wrist type
Patent
1980-06-16
1983-11-15
Spangler, Robert C.
Measuring, testing, or signalling instruments
Watch, wristwatch or case
Wrist type
D1002
Patent
active
D02713799
REFERENCES:
patent: D67101 (1925-04-01), Schwetlman
patent: D101076 (1936-09-01), Wadsworth
patent: D223272 (1972-04-01), Marquant
patent: D246575 (1977-12-01), Onodera et al.
patent: 3585794 (1971-06-01), Klingenberg
Jewelers' Circular-Keystone, Mar. 1979, p. 34, watch in center of illustration in bottom left corner.
Dupont S. T.
Shack Robert A.
Spangler Robert C.
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