IP Library › Granted Patent US 6,615,561
Granted Patent Utility
US 6,615,561 · App. 09/876,654

Retaining wall block

Inventors: Robert A. MacDonald, Robert J. Race
Patented Case View Patent ↗
Granted: Sep 9, 2003 Filed: Jun 7, 2001
Inventors
Robert A. MacDonald
Robert J. Race
Assignee (at issue)
Keystone Retaining Wall Systems, LLC

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 6,615,561
App. No.
09/876,654
Filed
2001-06-07
Granted
2003-09-09
Kind
B2