Mini electric inking box

Details Mini electric inking box Mini electric inking box

1987-04-22

1988-09-27

Haroian, Harry N.

Geometrical instruments

Straightedge type

Cord type

33138, G01B 302

Patent

active

047731621

ABSTRACT:
A type of mini electric inking box in which a small motor transmit drive through a gear set to a thread wheel, while the thread on the thread wheel is placed inside the ink box with a sponge and extended outwards, inside the box body is a detachable cover and a battery compartment, at the front is a lamp.

REFERENCES:
patent: 88212 (1869-03-01), Richardson
patent: 526937 (1894-10-01), Neff
patent: 1373884 (1921-04-01), Gregory
patent: 4189107 (1980-02-01), Quenot
patent: 4580347 (1986-04-01), McKnight

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