Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Face mask

Face mask

US Patent D321419 · Granted Nov 5, 1991

Assignee

Intertech Resources

Inventors

Dean R. Wallace (6 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Hydrophobic electrostatic breathing filters, and methods of manufacturing the sa2001

Manual resuscitator1992

Breathing circuit with slidable gas sampling tube1992

Nebulizer system1991

Antidisconnect harness for medical connections1981

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly