Beta blocker demonstration housing or the like

Details Beta blocker demonstration housing or the like Beta blocker demonstration housing or the like

1982-01-29

1984-08-28

Feifer, Melvin B.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Patent

active

D02752980

REFERENCES:
patent: 396381 (1889-01-01), Yaggy
patent: 2016151 (1935-10-01), Levene
patent: 3171216 (1965-03-01), Douthit et al.
patent: 3688008 (1972-08-01), Krieger, Sr.
patent: 4091549 (1978-05-01), Driller et al.

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