Humidity-retaining mask

Details Humidity-retaining mask Humidity-retaining mask

1989-06-27

1991-04-16

Nerbun, Peter

Apparel

Head coverings

Face coverings

12820113, 12820417, A61M 1600

Patent

active

050071149

ABSTRACT:
A humidity-retaining mask includes a foldable mask body made of humidity-absorbing sheet material which is folded into a honeycomb structure when the mask is used. The mask body has a recessed portion on the upper side thereof to receive a user's nostril, and ear traps attached to the mask body.

REFERENCES:
patent: 2348108 (1944-05-01), Bulbulian
patent: 3814094 (1974-06-01), De Angelis et al.
patent: 3835853 (1974-09-01), Turner
patent: 3982981 (1976-09-01), Takao et al.
patent: 4136691 (1979-01-01), Ebeling et al.
patent: 4150671 (1979-04-01), Tiger
patent: 4157090 (1979-06-01), Phillips
patent: 4196728 (1980-04-01), Granite
patent: 4325365 (1982-04-01), Barbuto
patent: 4327717 (1982-05-01), Oetjen et al.
patent: 4458679 (1984-07-01), Ward
patent: 4620537 (1986-11-01), Brown

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