Portable tennis score keeper

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

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D03424570

REFERENCES:
patent: D165553 (1951-12-01), Schoor
patent: D167094 (1952-06-01), Myers
patent: D281797 (1985-12-01), Tong
patent: D314711 (1991-02-01), Cox
patent: 2643466 (1953-06-01), Bucher
patent: 3762708 (1973-10-01), Hing
patent: 4189143 (1980-02-01), Van Auken et al.
patent: 4286323 (1981-08-01), Meday
patent: 4645206 (1987-02-01), Todd
patent: 4831956 (1989-05-01), Thater
patent: 4948125 (1990-08-01), Mayes

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