IP Library › Granted Patent US 6,803,812
Granted Patent Utility
US 6,803,812 · App. 10/419,470

Active filter

Inventor: Kazuo Kawai
Patented Case View Patent ↗
Granted: Oct 12, 2004 Filed: Apr 21, 2003
Inventor
Kazuo Kawai
Assignee (at issue)
General Research of Electronics, 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 6,803,812
App. No.
10/419,470
Filed
2003-04-21
Granted
2004-10-12
Kind
B2