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Patent
   D254793
Priority
Jan 11 1978
Filed
Jan 11 1978
Issued
Apr 22 1980
Expiry
Apr 22 1994
Inventors
Morey, Cli…
Assg.orig
STEAD, DOL…
Assg.curr
STEAD, DOL…
Entity
unknown
Referenced by
8
References
5
Maint.:
n/a
The ornamental design for a demonstrator for indicating the effect of additive in engine oil and the like, substantially as shown and described.

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 side elevational view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a top plan view thereof.
INVENTORS:

Morey, Clinton H.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
9589485, Oct 22 2012 Interactive brake display system
D270073, Jun 12 1981 Dolores E., Stead Demonstrator for indicating the effect of additive in engine oil and the like
D286060, Apr 30 1984 Dolores E., Stead Demonstrator for indicating the effect of additive in engine oil and the like
D286651, Dec 10 1984 Dolores E., Stead Demonstrator for engine oil additive
D566767, Sep 14 2005 Teacher's aid
D571401, Nov 08 2007 Transparent tank
D590019, Sep 14 2005 Aid for teaching projection drawing
D727421, Jul 02 2012 Brake assembly instruction model
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
1977244,
2700228,
3133976,
3215409,
454165,
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 10 1981MOREY, CLINTON H DBA INTERNATIONAL OIL CO STEAD, DOLORES E ASSIGNMENT OF ASSIGNORS INTEREST 0038750275 pdf
MAINTENANCE FEES AND DATES:    Maintenance records on the USPTO
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