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| Number | Title | Issue Date |
| 4643182 | Disposable protective mask A protective mask formed from a porous non-woven sheet material which is made of glass fibers and a suitable binding agent, and which may optionally include a gas adsorbent substance. The mask protects the respiratory system of the wearer from the effects... | 02/17/1987 |
| 4395332 | Adsorption and filtration mat for liquids Disclosed are filter mats composed of a wet laid, porous, non-woven matrix having randomly arranged, irregularly intersecting and overlapping cellulose fibers intermixed as a cobeat (i.e. beaten together) with micro-bits of an expanded, thermoplastic styr... | 07/26/1983 |
