IP Library › Granted Patent US 5,664,550
Granted Patent Utility
US 5,664,550 · App. 08/691,329

Ignition system of internal combustion engine

Inventors: Takashi Ito, Katsuaki Fukatsu, Ryoichi Kobayashi, Noboru Sugiura
Patented Case View Patent ↗
Granted: Sep 9, 1997 Filed: Aug 2, 1996
Inventors
Takashi Ito
Katsuaki Fukatsu
Ryoichi Kobayashi
Noboru Sugiura
Assignees (at issue)
HITACHI, LTD.
HITACHI CAR ENGINEERING CO., LTD.

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 5,664,550
App. No.
08/691,329
Filed
1996-08-02
Granted
1997-09-09
Kind
A