IP Library › Granted Patent US 4,693,256
Granted Patent Utility
US 4,693,256 · App. 06/392,845

Respiratory device

Inventor: Daniel A. Talonn
Patented Case View Patent ↗
Granted: Sep 15, 1987 Filed: Jun 28, 1982
Inventor
Daniel A. Talonn
Assignee (at issue)
Sherwood Medical Company

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 4,693,256
App. No.
06/392,845
Filed
1982-06-28
Granted
1987-09-15
Kind
A