Demonstrator for indicating the effect of additive in engine oil

Details Demonstrator for indicating the effect of additive in engine oil Demonstrator for indicating the effect of additive in engine oil

1984-04-30

1986-10-07

Ansher, Bernard

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D02860600

REFERENCES:
patent: D254793 (1980-04-01), Morey
patent: D270073 (1983-08-01), Morey
patent: 3172666 (1965-03-01), Ryan
patent: 3193293 (1965-07-01), Schaper

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