IP Library › Granted Patent US 5,632,271
Granted Patent Utility
US 5,632,271 · App. 08/622,734

Laryngeal mask with gastric-drainage feature

Inventor: Archibald I. J. Brain
Patented Case View Patent ↗
Granted: May 27, 1997 Filed: Mar 27, 1996
Inventor
Archibald I. J. Brain

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,632,271
App. No.
08/622,734
Filed
1996-03-27
Granted
1997-05-27
Kind
A