IP Library › Granted Patent US 4,675,004
Granted Patent Utility
US 4,675,004 · App. 06/723,802

Dual-lumen fistula needle

Inventors: Raymond L. Hadford, Wayne E. Quinton
Patented Case View Patent ↗
Granted: Jun 23, 1987 Filed: Apr 16, 1985
Inventors
Raymond L. Hadford
Wayne E. Quinton
Assignee (at issue)
QuinTron Instrument Company, Inc.

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 4,675,004
App. No.
06/723,802
Filed
1985-04-16
Granted
1987-06-23
Kind
A