Comparator

Details Comparator Comparator

1990-03-15

1991-04-16

Grieb, William H.

Amusement devices: games

Games accessories

All video game accessories

A63F 306

Patent

active

050076426

ABSTRACT:
A comparator device for use in comparing a first series of numbers written on a writing surface provided on the face of the device with a second series of numbers imprinted on a sheet of paper which can be fed through an internal passageway formed between the facing assembly of the device and a backing member so the numbers can be viewed through a reading window provided with a magnifying glass for magnifying the second series of numbers.

REFERENCES:
patent: 1248238 (1917-11-01), Young
patent: 3377717 (1968-04-01), Rowe
patent: 3491193 (1970-01-01), Bianchi
patent: 4600198 (1986-07-01), Fox
patent: 4772025 (1988-09-01), James et al.
patent: 4781379 (1988-11-01), Parks

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