Number | Name | Date | Kind |
---|---|---|---|
D248425 | Darrell | Jul 1978 | |
D273877 | Darrell | May 1984 | |
D311913 | Schaum | Nov 1990 | |
D315364 | Scalice et al. | Mar 1991 |
Entry |
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Trademarks & Symbols, vol. 2, p. 87, #5, 780, 781, 782, 1973. |
Handbook of Pictorial Symbols, p. 62--Question Marks, 1976. |