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The ornamental design for a triple tube viscosity testing instrument, as shown and described. |
FIG. 1 is a top, front and left side perspective view of a triple tube viscosity testing instrument showing our new design;
FIG. 2 is a front elevational view;
FIG. 3 is a rear elevational view;
FIG. 4 is a left side elevational view;
FIG. 5 is a right side elevational view;
FIG. 6 is a top plan view; and,
FIG. 7 is a bottom plan view thereof.
FIG. 1 has been drawn on a reduced scale with respect to FIGS. 2-7.
Jeffers, David G., Pachuta, Donald G.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Aug 29 1991 | Louis C. Eitzen Co., Inc. | (assignment on the face of the patent) | / | |||
Oct 04 1991 | JEFFERS, DAVID G | LOUIS C EITZEN CO , INC , A CORP OF CO | ASSIGNMENT OF ASSIGNORS INTEREST | 005887 | /0494 |
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