Hand-held tennis scorekeeper

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Scorer or indicator for game or sport

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D03782816

REFERENCES:
patent: D116325 (1939-08-01), Ryan
patent: D172471 (1954-06-01), Killoren
patent: D234529 (1975-03-01), Trager
patent: D314711 (1991-02-01), Cox
patent: D342457 (1993-12-01), Morrison
patent: 1706646 (1929-03-01), Auer, Jr.
patent: 2702954 (1955-03-01), Cline et al.
patent: 3455273 (1969-07-01), Willingham, Jr.
patent: 3730131 (1973-05-01), Izzo

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