IP Library › Granted Patent US 4,976,237
Granted Patent Utility
US 4,976,237 · App. 07/377,686

Engine air intake valve

Inventor: Steven Bollinger
Patented Case View Patent ↗
Granted: Dec 11, 1990 Filed: Jul 10, 1989
Inventor
Steven Bollinger
Assignee (at issue)
Carter Automotive 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 4,976,237
App. No.
07/377,686
Filed
1989-07-10
Granted
1990-12-11
Kind
A