IP Library Granted Patent US 4,883,474
Granted Patent Utility
US 4,883,474 · App. 07/062,844

Thoracic catheter

Inventors: David S. Sheridan, Ralph D. Alley
Patented Case View Patent ↗
Granted: Nov 28, 1989 Filed: Jun 16, 1987
Inventors
David S. Sheridan
Ralph D. Alley
Assignee (at issue)
David R. Sheridan

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 4,883,474
App. No.
07/062,844
Filed
1987-06-16
Granted
1989-11-28
Kind
A