| Patents for A62B 23 - Filters for breathing-protection purposes (3,172) |
|---|
| 01/01/1992 | CN2091693U Air-purifying nose mask |
| 12/27/1991 | EP0462477A2 Cover assembly and pre-filter for a respirator |
| 12/20/1991 | CA2043001A1 Cover assembly and pre-filter for a respirator |
| 12/20/1991 | CA2043000A1 Filter cover assembly for a respirator |
| 12/17/1991 | CA1293094C Resilient shape-retaining fibrous filtration face mask |
| 12/10/1991 | CA1292846C Charcoal bed assembly |
| 11/14/1991 | DE4014518A1 Multi-layer dust filer - has anti-bactericide and -fungicide action for allergy sufferer, using active metal filter |
| 11/12/1991 | US5063926 Respirator cartridge with sealant dispersion member |
| 10/22/1991 | US5058578 Simplified gas mask |
| 10/09/1991 | EP0450414A2 Impregnation for breathing protection filter with active carbon |
| 10/09/1991 | CN1055120A Composed gauze mask with the function of supplying air |
| 10/02/1991 | EP0448876A2 Filter cartridge |
| 10/01/1991 | US5052385 Filter container for an absorption filter and a particle filter, for direct or indirect connection to a protective mask |
| 09/30/1991 | CA2036639A1 Filter cartridge |
| 09/04/1991 | CN2083939U Mini nose filter |
| 08/13/1991 | US5038775 Plastic scrim |
| 08/06/1991 | US5036844 Cover assembly and pre-filter for a respirator |
| 07/30/1991 | US5035240 Prefilter On Respirators |
| 07/23/1991 | US5033507 Filter cover assembly for a respirator |
| 07/23/1991 | US5033465 Bonded adsorbent structures and respirators incorporating same |
| 06/27/1991 | WO1991008829A1 New filter media for use in surgical and clean room masks |
| 06/11/1991 | US5022901 Compression seal canister |
| 06/04/1991 | US5020533 Face mask with liquid and glare resistant visor |
| 05/23/1991 | DE3938581A1 Air supply for gas-mask from protective suit - interior also incorporating aerosol protection |
| 05/22/1991 | CN2077314U Hygienic dustproof apparatus |
| 05/14/1991 | US5015451 Process, filter and device for making available high-quality breathing air |
| 05/07/1991 | US5012805 Surgical mask barrier apparatus |
| 05/02/1991 | WO1991005584A1 Respiratory protection device |
| 04/03/1991 | EP0419751A1 Protective breathing mask |
| 03/20/1991 | EP0320505A4 Protective facial mask |
| 03/06/1991 | EP0414956A1 Face mask |
| 03/06/1991 | CN1049613A Chasing type micro dust-filter |
| 03/05/1991 | CA1280851C High efficiency respirator |
| 02/12/1991 | US4992219 Placing charcoal particles in housing, covering with retainer, compacting, securing with ultrasonic welding |
| 02/12/1991 | US4992084 Activated charcoal filter layer for gas masks |
| 01/15/1991 | US4984302 Nose-worn air filter |
| 12/18/1990 | US4977634 Pillow with poisonous gas removing cover |
| 12/11/1990 | US4976857 Filter element and fabrication methodology |
| 12/04/1990 | US4974586 Breathing mask |
| 11/21/1990 | CN2065929U Multi-functional rhinobyon |
| 11/13/1990 | US4969457 Low density polyethylene layer; gas flow; aids prevention |
| 11/08/1990 | DE3914606A1 Pollen filter against hay fever - with plastic frame and plastic filter mesh for nose |
| 11/01/1990 | WO1990012614A1 Nose-worn air filter |
| 10/24/1990 | CN2064247U Health nose filter |
| 10/23/1990 | US4964900 Respirator filter means for removal of tritiated water |
| 10/10/1990 | EP0391726A2 Improved filtration medium and face mask containing the same |
| 10/10/1990 | EP0391725A1 Method for making an electrostatically charged face mask |
| 10/07/1990 | CA2014053A1 Electrostatically charged face mask and method for the same |
| 10/07/1990 | CA2014052A1 Filtration medium and face mask containing the same |
| 08/30/1990 | DE3905975A1 Device for filtering toxic substances |
| 08/23/1990 | DE3904623A1 Filter in particular for a vehicle |
| 08/22/1990 | EP0383236A1 Filter, especially for a vehicle |
| 08/22/1990 | EP0383049A1 Respirator filter means for removal of tritiated water |
| 08/22/1990 | CN1044765A Anti-pollution device |
| 08/07/1990 | US4945907 Face mask |
| 07/11/1990 | EP0377342A1 Pollution-fighting device |
| 06/21/1990 | DE3841895A1 Apparatus for the filtration of nuclear, biological and chemical contaminants in breathing air |
| 06/19/1990 | US4934361 Respirator |
| 05/30/1990 | EP0370141A1 Method and apparatus for removing cyanogen chloride from air |
| 05/30/1990 | EP0370140A1 Method and apparatus for removing hydrogen cyanide, cyanogen and cyanogen chloride from air |
| 05/03/1990 | DE3837139A1 Device for supplying closed spaces with breathing air |
| 05/01/1990 | US4921512 Filter element |
| 05/01/1990 | US4920960 Body fluids barrier mask |
| 04/18/1990 | CN2056081U Nose dust filter |
| 04/11/1990 | EP0362920A1 Charcoal bed assembly |
| 03/20/1990 | CA1266854A1 Bonded adsorbent structures and respirators incorporating same |
| 03/14/1990 | EP0357693A1 Molecular sieve arrangement. |
| 03/14/1990 | CN2054335U Fibre-proof filter cork for breathing |
| 03/14/1990 | CN2054333U Dust prevention gauze mask |
| 02/28/1990 | EP0356000A2 Breathing apparatus |
| 02/28/1990 | CN2053516U Microsize dust filter |
| 02/27/1990 | US4904343 Non-woven activated carbon fabric |
| 02/22/1990 | WO1990001354A1 Air filter with sand filling for abc shelters |
| 02/07/1990 | CN2052287U Clip-free filtering box for dustproof mask |
| 02/06/1990 | US4898602 Selectively openable filtering assembly |
| 01/23/1990 | CA1264681A1 Automated production of canisters |
| 01/17/1990 | CN2051117U Spiral plate type miniature dust filter |
| 12/27/1989 | EP0348052A2 Fire and smoke protective hood |
| 12/12/1989 | US4886058 Filter element |
| 12/07/1989 | DE3818295A1 Gas filter, in particular for respirator masks |
| 11/28/1989 | US4883547 Method of forming a high efficiency respirator |
| 11/28/1989 | US4883052 Protective breathing mask |
| 11/23/1989 | EP0342807A2 Filter element |
| 11/15/1989 | EP0341874A2 Elastomeric filtration materials |
| 11/02/1989 | EP0339487A2 Active carbon filter layer for gas masks and gas mask containing said active carbon filter layer |
| 10/25/1989 | EP0338551A2 Active carbon filter layer for gas masks |
| 10/04/1989 | CN2045311U Sanitary health nose mask |
| 10/03/1989 | US4870959 Protective breathing mask |
| 09/27/1989 | CN2044880U Aspiration sieve |
| 09/27/1989 | CN2044879U Multifunction miniature respirator |
| 08/31/1989 | DE3805407A1 Chemisorption composition for breathing apparatuses |
| 08/15/1989 | US4856509 Face mask and method |
| 08/15/1989 | US4856508 Face mask |
| 08/08/1989 | US4854314 Safety pillow for preventing smoke inhalation |
| 07/25/1989 | US4850346 Respirator |
| 07/13/1989 | WO1989006156A1 Molecular sieve arrangement |
| 07/12/1989 | CN2040786U Miniature dustproof nose-plug |
| 06/21/1989 | EP0320505A1 Protective facial mask. |
| 05/31/1989 | EP0317593A1 Process, filter and device for supplying high-quality breathing air. |
| 05/23/1989 | US4832018 Filter case holder |