IP Library › Granted Patent US 4,453,720
Granted Patent Utility
US 4,453,720 · App. 06/525,231

Field game

Inventor: David King
Patented Case View Patent ↗
Granted: Jun 12, 1984 Filed: Aug 22, 1983
Inventor
David King

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 4,453,720
App. No.
06/525,231
Filed
1983-08-22
Granted
1984-06-12
Kind
A