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EP0804263B1
(en)
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Respirator having snap-fit filter cartridge
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US4233972A
(en)
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Portable air filtering and breathing assist device
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US3736927A
(en)
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Self-contained air purifier and conditioner unit
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US3657740A
(en)
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Ventilated welder{3 s mask assembly
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US3413972A
(en)
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Airflow helmet
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US10653197B2
(en)
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Hard hat with filtered, battery-operated air flow system and method
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EP0164946A2
(en)
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Improvements in and relating to respirators
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EP0108560A1
(en)
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Powered air supply units for respirators
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FR785223A
(fr)
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Appareil portatif de protection contre les gaz
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FR782137A
(fr)
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Perfectionnements aux masques à gaz
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GB1212821A
(en)
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Improvements in or relating to respirator devices
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FR1320829A
(fr)
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Aérateur autonome pour la respiration en atmosphère polluée
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FR818839A
(fr)
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Perfectionnements aux appareils respiratoires
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AT115845B
(de)
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Filter, insbesondere Atmungsfilter für Rauch und Nebel, sowie Verfahren zu seiner Herstellung.
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DE1979478U
(de)
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Zum anbau an landwirtschaftlichen maschinen, insbesondere maehdreschern, geeignetes luftreinigungsgeraet.
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DD749A
(da)
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