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US3322391A
|
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Warning disconnector-connector
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US3315674A
|
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Filter mask facelet
|
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US3315272A
|
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Dual visor helmet
|
|
US3308815A
|
|
Connector regulator for breathing mask
|
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US3088477A
|
|
Suffocation inhibiting inhalator-exhalator valve
|
|
US3158152A
|
|
Mouth to mouth resuscitator
|
|
US2979730A
|
|
Elbow locking mechanism for an artificial limb
|
|
US3158153A
|
|
Passenger mask assembly
|
|
US3035594A
|
|
Combination inhalator-exhalator valve with hose pull protection
|
|
US3035573A
|
|
Oxygen mask and helmet retention assembly
|
|
US2953129A
|
|
Valve and microphone base assembly
|
|
US2966917A
|
|
Combination valve for breathing equipment
|
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CA810353A
|
|
Dual visor helmet
|
|
CA849299A
|
|
Pressure compensated exhalation valve
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