Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Phonation valve for breathing tube

Phonation valve for breathing tube

US Patent 6334441 · Granted Jan 1, 2002

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Methods and devices for obstructing and aspirating lung tissue segments2006
Methods and devices for obstructing and aspirating lung tissue segments2003
Bi-functional in-line phonation valve2002
Bi-functional in-line phonation valve2001
Pressurized packaged reference liquid for blood gas analysis1990
Biopolymer compositions having enhanced filterability1987
Composition for detoxification1986
Railroad grade crossing1985
Ink jet head1981