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The ornamental design for demonstrator for indicating the effect of additive in engine oil and the like, substantially as shown. |
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FIG. 1 is an isometric view from an upper aspect of a demonstrator for indicating the effect of additive in engine oil and the like, showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof; and
FIG. 6 is a right side elevational view thereof.
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| D254793, | Jan 11 1978 | STEAD, DOLORES E | Demonstrator for indicating the effect of additive in engine oil and the like |
| D270073, | Jun 12 1981 | Dolores E., Stead | Demonstrator for indicating the effect of additive in engine oil and the like |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 20 1984 | MOREY, CLINTON H | STEAD, DOLORES E | ASSIGNMENT OF ASSIGNORS INTEREST | 004256 | /0135 | |
| Apr 30 1984 | Dolores E., Stead | (assignment on the face of the patent) | / |
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