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Patent
   D261399
Priority
Oct 15 1979
Filed
Oct 15 1979
Issued
Oct 20 1981
Expiry
Oct 20 1995
Inventors
Wagner, Ro…
Assg.orig
Assg.curr
Entity
unknown
Referenced by
1
References
5
Maint.:
n/a
The ornamental design for a black jack slide rule, as shown and described.

FIG. 1 is a front elevational view of a black jack slide rule showing my new design;

FIG. 2 is a right edge elevational view; and

FIG. 3 is a rear elevational view.
INVENTORS:

Wagner, Robert G.

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