Diaphragm

Details Diaphragm Diaphragm

1976-03-15

1979-06-19

Spangler, Robert C.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D23 47, D2302

Patent

active

D02521563

REFERENCES:
patent: 3317087 (1964-09-01), Landis
patent: 3722756 (1973-03-01), Cramer, Jr.

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