IP Library Granted Patent US 5,644,571
Granted Patent Utility
US 5,644,571 · App. 08/073,217

Apparatus for message filtering in a network using domain class

Inventor: Michael J. Seaman
Patented Case View Patent ↗
Granted: Jul 1, 1997 Filed: Jun 4, 1993
Inventor
Michael J. Seaman
Assignee (at issue)
Digital Equipment Corporation

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 5,644,571
App. No.
08/073,217
Filed
1993-06-04
Granted
1997-07-01
Kind
A