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US1706602A
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Respiratory headgear
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US1636766A
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Carrying device or belt for breathing apparatus, particularly selfrescuing apparatus
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US1621498A
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Check valve for respirating apparatus
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US1596162A
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Eyepiece
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US1699101A
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Device for feeding additional oxygen in freely-portable respiratory apparatus
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US1706601A
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Harness for respirating appliances such as masks, respirators, and the like
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US1635545A
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Protective cover for breathing apparatus
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US1554564A
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Multiple-way fixture for connecting a plurality of pipes
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US1564835A
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Self-contained lung-power breathing device
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US1589463A
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Supporting device for self-contained breathing apparatus
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US1654925A
|
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Air-purifying cartridge for breathing devices
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US1533172A
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Breathing bag for self-contained breathing apparatus
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US1463804A
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Pressure-gauge connection
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US1424810A
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Stop valve for pressure-gas containers
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US1448918A
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Supporting frame for self-contained breathing apparatus
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US1610760A
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Breathing apparatus
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US1592345A
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Mouthpiece for respiratory apparatus
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US1532654A
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Self-contained breathing apparatus
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US1472117A
|
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Respiratory apparatus
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US1395948A
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Helmet and mask for use with respiratory apparatus
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