IP Library › Granted Patent US 4,477,404
Granted Patent Utility
US 4,477,404 · App. 06/376,978

Process for producing grooved choke plates for adjustable chokes

Inventors: Kurt Stoll, Hans-Heinrich Glattli
Patented Case View Patent ↗
Granted: Oct 16, 1984 Filed: May 10, 1982
Inventors
Kurt Stoll
Hans-Heinrich Glattli

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 4,477,404
App. No.
06/376,978
Filed
1982-05-10
Granted
1984-10-16
Kind
A