Air duct filter apparatus

Details Air duct filter apparatus Air duct filter apparatus

1997-01-17

1998-03-10

Lichtenstein, Lisa

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Air treatment

D23393, 2304

Patent

active

D03920313

REFERENCES:
patent: D362905 (1995-10-01), Wulf et al.
patent: 3760568 (1973-09-01), Newmann et al.
patent: 4175936 (1979-11-01), Lough et al.

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