Vacuum filter

Details Vacuum filter Vacuum filter

1979-10-01

1981-10-20

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

D 7 68, D2301

Patent

active

D02614138

REFERENCES:
patent: 65515 (1867-06-01), Speneer
patent: D142255 (1945-08-01), Frost
patent: D153202 (1949-03-01), Beller
patent: 2449238 (1948-09-01), Lightfoot, Jr.
patent: 3437211 (1969-04-01), Lindsey

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