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Patents
Patents Assigned to Dolores E. Stead
Patents Assigned to Dolores E. Stead
Demonstrator for indicating the effect of additive in engine oil and the like
Patent number:
D270073
Type:
Grant
Filed:
June 12, 1981
Date of Patent:
August 9, 1983
Assignee:
Dolores E. Stead
Inventor:
Clinton H. Morey
Demonstrator for indicating the effect of additive in engine oil and the like
Patent number:
D286060
Type:
Grant
Filed:
April 30, 1984
Date of Patent:
October 7, 1986
Assignee:
Dolores E. Stead
Inventor:
Clinton H. Morey
Demonstrator for engine oil additive
Patent number:
D286651
Type:
Grant
Filed:
December 10, 1984
Date of Patent:
November 11, 1986
Assignee:
Dolores E. Stead
Inventor:
Clinton H. Morey
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