Access control icon for a portion of a computer display

Details Access control icon for a portion of a computer display Access control icon for a portion of a computer display

1991-06-14

2000-04-18

Tung, M. H.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

1402

Patent

active

D04229851

REFERENCES:
patent: D281081 (1985-10-01), Zwissler et al.
patent: 5008853 (1991-04-01), Bly et al.
The Macintosh Bible, Second Edition, keylock icons, pp. 636-637, 1988.
hDC Windows Express Editor Manual, color palette icon, p. 39, 1988.
Symbol Sourcebook, lock symbol, p. 35, 1972.
Symbol Sourcebook, key symbols, p. 37, 1972.
Handbook of Pictorial Symbols, key symbols, pp. 58-59, 1976.

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