Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Face mask with lip, fold, and resilient spring means to improve seal

Face mask with lip, fold, and resilient spring means to improve seal

US Patent 5349949 · Granted Sep 27, 1994

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Speedometer insensitive to icy conditions and heavy rainfall2017
Method and device for the anticipated detection of icing on a runway2015
Respirator mask with hygienic protection2013
Respirator mask with hygienic protection2009
Individual cooling system2003
Head protection system with regulated pressure areas1998
Optimal pneumatic pressure regulator with electronic compensation1997
Individual protective and breathing equipment for contaminated environments1997
Process for determining the position of a helmet1995
Process to obtain an homogeneous mixture of liquid oxygen and liquid nitrogen1995
Protective equipment including a closed suit1994
Equipment for respiratory protection against pollutants1994