Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Control valve for a breathing mask

Control valve for a breathing mask

US Patent 4606339 · Granted Aug 19, 1986

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Breathing mask with flow indicator for the respiration air1994
Respirator with blower support and regeneration of the breathing filter1991
Lung-controlled valve for respirator masks having positive pressures inside the 1989
Gas mask having a protective hood1988
Device for affixing a respiratory mask onto a protection helmet1988
Control for a protective mask which operates with excess internal pressure1986
Protective helmet with releasably connected protective breathing mask1985
Seal1985
Ready use respirator1984