Demineralizing filter for ultrasonic humidifiers

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified

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Details

D23 3, D23149, D23146

Patent

active

D02920174

REFERENCES:
patent: D250411 (1978-11-01), Krueger et al.
patent: D257544 (1980-11-01), Johnson
patent: D257566 (1980-11-01), Kottmeier et al.
patent: 4294407 (1981-10-01), Reichl et al.

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