IP Library › Granted Patent US 5,538,921
Granted Patent Utility
US 5,538,921 · App. 08/362,616

Integrated circuit fabrication

Inventor: Yaw S. Obeng
Patented Case View Patent ↗
Granted: Jul 23, 1996 Filed: Dec 22, 1994
Inventor
Yaw S. Obeng
Assignee (at issue)
AT&T CORP.

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 5,538,921
App. No.
08/362,616
Filed
1994-12-22
Granted
1996-07-23
Kind
A